Malicious PDF — malware analysis report

Static analysis result for SHA-256 76650dec19971e9a…

MALICIOUS

PDF

31.6 KB Created: 2020-04-11 09:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17963d8c1cf1d84b0898975e3add3a57 SHA-1: 173ef12261bf3995435355f7f2f2a19d7c4e0bc2 SHA-256: 76650dec19971e9ab5f4f901cad4accad60f2d6109110b0af9b18548b119541e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to obscure malicious activity or distribute further payloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 3

  • 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.
  • 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://lastfrontiermusic.com/uploads/1/3/0/9/130969704/130969704.html#99+construction+cost+osrs
    • http://sorensen-sorensen.com/uploads/1/3/0/5/130551059/2bf109d43e9.pdf
    • http://eastwesteventeurs.com/uploads/1/3/0/5/130550834/wawurawanomitu-sijunob-wulof.pdf
    • http://peoplesoundsmusic.com/uploads/1/3/1/4/131438460/5528684.pdf
    • http://bitgateds.com/uploads/1/3/1/3/131379356/busobap.pdf
    • http://our-village.uk/uploads/1/3/0/6/130639411/332292.pdf
    • http://michaelbisutti.com/uploads/1/3/1/4/131438013/97a09ebc88d06bc.pdf
    • http://pilotageapparel.com/uploads/1/3/0/5/130588702/1445368.pdf
    • http://mytruerepair.com/uploads/1/3/1/4/131453121/jajizikenapok.pdf
    • http://divetogo.net/uploads/1/3/1/3/131381693/vafuxifurasax_pawuzuzu_fanaporini_jatimuwunomut.pdf
    • http://educationforallllc.org/uploads/1/3/1/4/131452818/c0995f41b4a24.pdf
    • http://localleadgen.solutions/uploads/1/3/0/6/130622080/08d5d9aba95f.pdf
    • http://longbuilderscompany.com/uploads/1/3/0/6/130639296/vejip_zitutuluniluloz.pdf
    • http://twomuchbyantonio.com/uploads/1/3/0/6/130639720/6979647.pdf

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