Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7a4d4b57d04e4c…

MALICIOUS

PDF

35.0 KB Created: 2021-09-19 07:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dc64cbb67a1fe941a854fb83a4b74f79 SHA-1: 42b0dd6d1704c464b2b5129fcebcf693a917fecb SHA-256: 8e7a4d4b57d04e4c0c6632c34c664f59bad12627d22b411deb4b7d325493c07e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it's an image-only document designed as a lure, containing a clickable link to an external URL. This suggests a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8175

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://huntic.ru/uplcv?utm_term=write+an+equation+of+a+parabola+with+the+given+vertex+and+focus PDF link annotation

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