Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f597b7228b7d58c…

MALICIOUS

PDF

36.0 KB Created: 2021-10-03 05:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7d090350695ca3eccaabcd070f309d96 SHA-1: 3cbc252a1ed0f67840156f13319d000538d9f5cd SHA-256: 9f597b7228b7d58c2f3ba1bd9c16133b5fd262b0035d6dbe801a1a296e929c82
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier. It uses an image-only lure, a common tactic for phishing or malware delivery. The presence of embedded URLs, one of which is unknown and potentially malicious, suggests it directs users to a harmful site. No scripts were extracted, but the PDF structure itself is indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7833

Heuristics 4

  • 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 35 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://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329f723eb47---tomotiwobizimigef.pdf In PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=diagram+of+convex+and+concave+lensPDF link annotation

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