Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf6417c090c5245…

MALICIOUS

PDF

53.3 KB Created: 2021-05-26 06:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e1de28b49a4af2c04ff442888f9e6e SHA-1: d3db886ac58ccf8863df71f739d55fedc6fe2558 SHA-256: 0cf6417c090c5245b019e08a745b4048a880be7c1cf3e9bc71632763638ebb02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier indicate malicious content, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6648

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://synerhu.ru/uplcv?utm_term=libro+el+desafio+del+amor+para+padres+pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d99140b4514e4e7e7611c23fcb7f1a0e/65231422839.pdf
    • https://muratay.nl/userfiles/file/ranegok.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/21384097215.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab284dd4033---10420019659.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/7r9lt57egnfqaqnnpshp50i596/faborajapudafexop.pdf
    • http://novussiteyonetimi.com/uploads/file/35884400364.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f2f8a8275---66158925370.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800fa2f1572---retuxizugu.pdf
    • https://aawyx.com/sites/default/imageuser/file/57673741675.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4081b5f05d---rameroramotobele.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160781b01a9bf8---83036692306.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822e8376cf3---jawidesot.pdf
    • https://unosms.us/userfiles/file/77123570862.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad909bc8d50---99005065446.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/refaberulekilof.pdf
    • http://goteneplast.se/files/images/file/linukavopakevuxotowijun.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/e139b74f137c371979779b234315ee1b/zolafuxijiropavokodame.pdf

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