PDF malware analysis — malicious · b8eed2613f66f1e5

MALICIOUS

PDF

55.4 KB Created: 2021-07-24 04:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d1fc0d166a7fffb52c280aeed98a4c18 SHA-1: 2d28066c4b5768afce7961ff9951e401f840fa22 SHA-256: b8eed2613f66f1e50f3220c0bd836d01b141cac18ea7170c1a84fd844b1f312f

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised or disposable hosting. The presence of 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicates an attempt to distribute content through potentially untrustworthy sources. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9177

Heuristics 4

PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://j-club.eu/userfiles/file/17982748197.pdf In PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adf30063e59---wubapopemexajejinuregame.pdfIn PDF document text
- http://vantaidongsaigon.com/uploads/files/sizixixiwozobuterame.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d6b152f59469f5759c15451155372a51/79459745607.pdfIn PDF document text
- https://digireg.it/upload/64173882301.pdfIn PDF document text
- https://zifu-tech.com/app/webroot/userfiles/files/88711562701.pdfIn PDF document text
- http://sbsinternationalschool.org/sbsisnew/userfiles/file/wukesovonug.pdfIn PDF document text
- http://bagumul.com/file_upload/spaw_upload/file/20210613205517.pdfIn PDF document text
- http://sodrex.pl/userfiles/file/30723105621.pdfIn PDF document text
- http://shinies.ru/img/lib/file/28254477448.pdfIn PDF document text
- https://banghenails.com/upload/file/lolaviwekigudufej.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaad36f2be---salesoxowikenewate.pdfIn PDF document text
- http://bettaletroom.com/file_media/file_image/file/52921123213.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=death+dungeon+demon+hunter+rpg+mod+apkPDF link annotation
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3ecda096f67c32da3a8ec11b1d698219/junitev.pdfIn PDF document text

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