Malicious PDF — malware analysis report

Static analysis result for SHA-256 79455972c0468dcb…

MALICIOUS

PDF

59.9 KB Created: 2021-03-28 11:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c211a82f1cdc3af8ea0f87c760e34db8 SHA-1: da9e03200350e480894a53db4aa47966dd4cd4f3 SHA-256: 79455972c0468dcbe6160d495287c37bb717bb5e5b52f62f6401bbb7ff5a5d3c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, a technique often used in phishing or SEO spam campaigns to drive traffic to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically indicates a large number of external links, and the ML classifier and ClamAV detection confirm its malicious nature. While no scripts were directly extracted, the presence of external links suggests an attempt to redirect the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7109

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=base64+to+file+pdf+online
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/e7f23e.pdf
    • https://cdn.sqhk.co/gixelotopa/jhgUQhi/65403347806.pdf
    • http://adminhalil.com/what_happens_if_you_lose_your_gold_passport_in_foreign_countryupmig.pdf
    • http://chtotakoebezuz.biz/8131165959445vbo.pdf
    • https://cdn.sqhk.co/goberirud/3StKK3e/43570625797.pdf
    • http://ita-women.space/daddy_s_goodnight_kiss_guide9kf3r.pdf
    • http://naturaitalia.space/612857225844ovh6.pdf
    • http://tdsevsvet.ru/palanga_autobus_stotis_informacijao7ltx.pdf
    • https://loloxemevo.weebly.com/uploads/1/3/0/7/130739498/fukixoja_jibosikisunuz_fifov.pdf
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_f9bf62ca149d4ae695da8bde406b4cb2.pdf?index=true
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_d63ccd429484428a87aabaae3e009336.pdf?index=true
    • https://s3.amazonaws.com/wowonesoribu/3ds_max_foliage_plugin_free.pdf
    • https://1747caf2-50c5-4ace-8f30-8d3f4e2f7d49.filesusr.com/ugd/017962_006cc9d432ec405ba6a6c535f88b5db8.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_e85c0d85cebd4a50bd4b6eb3538d41bb.pdf?index=true
    • https://s3.amazonaws.com/jujadodedaruxix/what_does_psychoanalytic_theory_mean_in_literature.pdf
    • https://s3.amazonaws.com/begijufadi/kagogari.pdf

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