mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))

[[TODO: MAP ONE SENTENCE SUMMARY]]

Category: [[TODO: MAP CATEGORY]] Avg 0.9 req/min Seen on 17 systems 430 observed requests 2 exact variants First seen August 6, 2026 Last seen October 19, 2026

[[TODO: MAP INTRODUCTION PARAGRAPH 1]]

[[TODO: MAP INTRODUCTION PARAGRAPH 2]]

What is mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))?

[[TODO: MAP DEFINITION SUMMARY]]

[[TODO: MAP SHORT REFERENCE SUMMARY]]

Analyst summary: [[TODO: MAP ANALYST REPORT SUMMARY]]
User-agent
mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))
Observed source IPs
0
Observed requests
430
Source networks
33
Exact variants
2
Latest hit count
176
Latest miss count
9
Latest 404 count
0
Unique paths
0
Related campaigns
[[TODO: MAP RELATED CAMPAIGN COUNT]]

Observed exact user-agent strings

mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)) First seen August 6, 2026 · Last seen October 19, 2026
mozilla linux applewebkit khtml like gecko chrome safari compatible meta externalads https developers facebook docs sharing webmasters crawler First seen September 12, 2026 · Last seen September 25, 2026

Behavior profile

[[TODO: MAP BEHAVIOR PROFILE INTRO]]

Category
[[TODO: MAP CATEGORY]]
Average request rate
0.9 requests per minute
HTTP and HTTPS support
[[TODO: MAP HTTP HTTPS SUPPORT]]
HTTP version support
[[TODO: MAP PROTOCOL SUPPORT SUMMARY]]
Redirect behavior
[[TODO: MAP REDIRECT BEHAVIOR]]
Robots.txt behavior
[[TODO: MAP ROBOTS TXT BEHAVIOR]]
Crawl-rate behavior
[[TODO: MAP CRAWL RATE BEHAVIOR]]
JavaScript execution
[[TODO: MAP JAVASCRIPT SUPPORT]]
Form submission activity
[[TODO: MAP FORM SUBMISSION ACTIVITY]]
Malformed URL requests
[[TODO: MAP MALFORMED URL BEHAVIOR]]
HTTP/1.0: [[TODO: MAP HTTP 1.0 SUPPORT]] HTTP/1.1: [[TODO: MAP HTTP 1.1 SUPPORT]] HTTP/2: [[TODO: MAP HTTP 2 SUPPORT]] HTTP/3: [[TODO: MAP HTTP 3 SUPPORT]] [[TODO: MAP HEADER ORDER FINGERPRINTED]]

Source distribution

[[TODO: MAP SOURCE DISTRIBUTION INTRO]]

Top countries

Country Networks Site sightings Share
Ireland 16 36 87.9%
Unknown 14 14 9.5%
United States 3 5 2.6%

Top ASNs

ASN Organization Networks Share
AS32934 [[TODO: MAP ASN ORGANIZATION]] 19 90.5%

Top datacenters

Provider Type Snapshots Share

Representative source IPs

[[TODO: MAP REPRESENTATIVE IPS INTRO]]

HTTP fingerprint and request characteristics

[[TODO: MAP HTTP FINGERPRINT INTRO]]

Observed header order
[[TODO: MAP HTTP HEADER ORDER SUMMARY]]
Common headers sent
[[TODO: MAP COMMON HEADERS SUMMARY]]
TLS and HTTPS behavior
[[TODO: MAP TLS HTTPS SUMMARY]]
URL normalization behavior
[[TODO: MAP URL NORMALIZATION SUMMARY]]
Malformed request patterns
[[TODO: MAP MALFORMED REQUEST SUMMARY]]
[[TODO: MAP OBSERVED HTTP HEADERS]]

Observed sample requests

[[TODO: MAP SAMPLE REQUESTS INTRO]]

POST
/wp-json/bitfire/v1/browser-verify?_fn=xhr&_bfa=5096a4eb4d0ffac00b4203f4.vbarxinkwiij.1786708800&per=0&_bfg=%5B%5D
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
GET
/shows/2025-2026-professional-shows/sleeping-beauty-the-time-traveler/null
Status pattern: HTTP 404
Seen 1 times, Last seen August 14, 2026
GET
/shows/2025-2026-professional-shows/sleeping-beauty-the-time-traveler/
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
GET
/sitemap.xml
Status pattern: HTTP 301
Seen 1 times, Last seen August 14, 2026
POST
/wp-json/bitfire/v1/browser-verify?_fn=xhr&_bfa=659e9cb54cc02cabb6f14c78.gsm4w5bujupc.1786701600&per=0&_bfg=%5B%5D
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
GET
/academy-classes/elementary-classes-2/
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
POST
/wp-json/bitfire/v1/browser-verify?_fn=xhr&_bfa=51c8f329099eb692599d0933.jlgnr9vjypfe.1786694400&per=0&_bfg=%5B%5D
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
GET
/academy-classes/at-your-school/null
Status pattern: HTTP 404
Seen 1 times, Last seen August 14, 2026
POST
/wp-json/bitfire/v1/browser-verify?_fn=xhr&_bfa=037a7fe6e53a6bd0b1c93d77.dfsitdkdeisl.1786694400&per=0&_bfg=%5B%5D
Status pattern: HTTP 200
Seen 1 times, Last seen August 14, 2026
GET
/sitemap.html
Status pattern: HTTP 404
Seen 1 times, Last seen August 14, 2026

Related campaigns and associations

[[TODO: MAP RELATED CAMPAIGNS INTRO]]

[[TODO: MAP RELATED CAMPAIGN NAME]]

[[TODO: MAP RELATED CAMPAIGN SUMMARY]]
Related IPs: [[TODO: MAP RELATED CAMPAIGN IP COUNT]], Systems seen: [[TODO: MAP RELATED CAMPAIGN SYSTEMS SEEN]]
Confidence: [[TODO: MAP RELATED CAMPAIGN CONFIDENCE]]

Detailed analyst report

[[TODO: MAP ANALYST REPORT PARAGRAPH 1]]

[[TODO: MAP ANALYST REPORT PARAGRAPH 2]]

[[TODO: MAP ANALYST REPORT PARAGRAPH 3]]

Frequently asked questions about mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))

What is mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))?

[[TODO: MAP FAQ WHAT IS ANSWER]]

Is mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)) considered malicious?

[[TODO: MAP FAQ MALICIOUS ANSWER]]

Does mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)) respect robots.txt and crawl-rate controls?

[[TODO: MAP FAQ ROBOTS ANSWER]]

What infrastructure is commonly associated with mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko) chrome/145.0.0.0 safari/537.36 (compatible; meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))?

[[TODO: MAP FAQ INFRASTRUCTURE ANSWER]]