Malicious PDF — malware analysis report

Static analysis result for SHA-256 660fe3fc4e17dd82…

MALICIOUS

PDF

50.6 KB Created: 2020-11-30 20:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab33e2c4160b1a97cd8a733fb63bd90 SHA-1: 2216b2840f663ae7318df683cb43ceae1dc7d1bb SHA-256: 660fe3fc4e17dd82bf91e8c09cb30b60ba33e0ca698b6895a77e6faf4de271b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous external links, a common tactic for link farms or phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and one specific URL, 'https://trafficel.ru/aws?utm_term=courier+website+template+wordpress', is flagged as a potential entry point for malicious activity. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5258

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=courier+website+template+wordpress
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f9e7e9a43b51.pdf
    • https://zagusopiv.weebly.com/uploads/1/3/4/2/134234894/d117ac9ed8ef.pdf
    • https://uploads.strikinglycdn.com/files/b3c96506-89d5-4b49-90ec-cebda63c0e32/xunigutoxojugog.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe059c2dd96f5918b517b8/1606288796329/keurig_duo_plus_filter.pdf
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc17e004e98326c0248b824/1606516225074/texubiwinapuvef.pdf
    • https://uploads.strikinglycdn.com/files/a84d3457-0292-48e4-b154-da4e0907bdcf/tekabovutabisozatam.pdf
    • https://uploads.strikinglycdn.com/files/f3336aea-5e9b-4001-85b2-582a97f44d38/95156538245.pdf
    • https://static1.squarespace.com/static/5fc0e734ec917750a3d7e8d7/t/5fc5370aeaf37e3b6445e36d/1606760205319/phet_build_an_atom_part_2_answers.pdf
    • https://uploads.strikinglycdn.com/files/8be07d66-b8c9-480c-bca8-48973337b371/95955145175.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ddc3c6ccf69f354dec2/1606372830740/wekixo.pdf
    • https://uploads.strikinglycdn.com/files/784c864f-c5be-4820-9c8b-d04dc5cd7934/89313058812.pdf

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