Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f4c8ca04899862…

MALICIOUS

PDF

35.9 KB Created: 2021-09-06 10:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 483182a4df698ac4d30a551a9bb7e53b SHA-1: 28eafc7c542a5727414ce71372c9451d46e36e34 SHA-256: c5f4c8ca04899862c14f396a1dd0f6066e7beb3feaa1000182e3b275465f881b
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing or malware distribution. It contains multiple embedded URLs that likely serve as the next stage in the attack chain. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7170

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://cemb.ca/upload/editor/file/luzorepusesubix.pdf In PDF document text
    • http://omegapizza.net/uploads/files/33304103614.pdfIn PDF document text
    • https://papiratisk.cz/soubory/66734437335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+worksheets+for+kindergarten+shapesPDF link annotation

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