Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c394c82043bdb1…

MALICIOUS

PDF

55.8 KB Created: 2021-08-03 17:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93e74d35c6a7167f2dba67c034fd732f SHA-1: 0f76cabcc461fb5d5f1b3b35300f68eeb1b5dc32 SHA-256: e8c394c82043bdb17076eec31811490de8e604e45578c66314427f60b10f18b3
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and a machine learning classifier. Heuristics indicate it's an image-only document designed as a lure, containing a clickable link. The embedded URL, though marked as benign, is part of the attack chain. No scripts were extracted, limiting the analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5063

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 55 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://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=addition+and+subtraction+of+polynomials+worksheet+1+answers

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