Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb058ccb864b940e…

MALICIOUS

PDF

68.1 KB Created: 2021-06-17 05:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ac809f98c93eac3c7037f955a3f2bea SHA-1: 509f4c65775a2fb2e6d5f21e42ded99f363c4c88 SHA-256: fb058ccb864b940eb16bf5d151aa03b816e73f5f6730f5853e0dafa2397704b7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'krisoc.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, and the presence of a PDF_URI heuristic suggests an attempt to redirect the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6905

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://krisoc.ru/uplcv?utm_term=eight+noble+truths PDF link annotation

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