Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e530b2eb50d1bb8…

MALICIOUS

PDF

35.9 KB Created: 2021-09-17 05:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bb64d19ddbc93795ac6e2856bac99e4b SHA-1: aaad2fcb0ca363a59740f66ddfccdb2d4a796ce0 SHA-256: 1e530b2eb50d1bb89281e58fbb5b2597a5d123754e9d147493281446bae6fa33
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, and heuristics indicate it's an image-only lure. The document body is heavily obfuscated, but the presence of embedded URLs suggests an attempt to redirect the user to malicious sites. The primary attack pattern involves a phishing lure, likely to download further payloads or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7874

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 http://mtegl.wsystem.sk/userfiles/files/nizokidunez.pdf In PDF document text
    • http://mopron.ru/upload/files/76836708627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=android+weather+widget+celsius+and+fahrenheitPDF link annotation

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