Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aca23317cf6d9dc…

MALICIOUS

PDF

35.8 KB Created: 2021-09-25 02:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 9dc39b0d8cea670f034a77237099f16d SHA-1: 2b7ed7a91b3355eb8b144f590466606da7376cf7 SHA-256: 9aca23317cf6d9dcb12a47cae5162c57f2507cea1d6f17eba09f85b58972a2a1
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it's an image-based document designed to trick users into clicking an embedded URI. The embedded URL, https://infrive.ru/uplcv?utm_term=dvorak+keyboard+android, is the primary IOC, likely serving as a gateway to a malicious site or payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7731

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://infrive.ru/uplcv?utm_term=dvorak+keyboard+android PDF link annotation
    • http://onlytech-tunisie.com/userfiles/file/limavefadinamaximadireg.pdfIn PDF document text
    • http://net-marketing.hu/images/files/vesomixozu.pdfIn PDF document text

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