Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec42d3295ec7d82e…

MALICIOUS

PDF

65.6 KB Created: 2021-04-01 22:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a30b1c7c405e185f3368497ed11b8bf2 SHA-1: 4d2191e5b644c78345551e643237ed4219c3e86a SHA-256: ec42d3295ec7d82ec96728e58be9817f59c92addd851ea871284df6422811292
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious, likely a phishing lure, due to its structure containing only an image and a single clickable action. It contains numerous external links, with one prominent URL pointing to 'bologen.ru'. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5403

Heuristics 5

  • 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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 65 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://bologen.ru/strik?utm_term=lazarillo+de+tormes+tratado+1+english
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    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/3780767.pdf
    • https://cdn.sqhk.co/dusawugivepo/IwQgggf/rodebawirexujefur.pdf
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