Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d23bb37a1292cc…

MALICIOUS

PDF

35.9 KB Created: 2021-09-05 03:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a81fd49638258f0a8c7cd8c86b5e9649 SHA-1: 303ea1d2d52a3e6df1d241e2143906348d7b0908 SHA-256: e5d23bb37a1292ccced8a4547d73cfe22f9be1aaa7b68a02b9642056c3de367f
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and a machine learning classifier. Heuristics indicate it's an image-only lure, a common tactic for phishing. The embedded URL points to a PDF hosted on a suspicious domain, likely serving as a redirect to a malicious site or directly hosting a payload. No scripts were extracted, but the overall structure suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7833

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://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a812a4e34fc---79357244078.pdf In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=combine+pdf+files+into+one+using+adobe+readerPDF link annotation

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