Malicious PDF — malware analysis report

Static analysis result for SHA-256 53418d5820ac5fe6…

MALICIOUS

PDF

200.8 KB Authoring application: PyPDF2
MD5: 27ec1ce7af7918df00c51de6e2ab9b82 SHA-1: 68900b6ec5a8115521047e26114a24150b2edaf4 SHA-256: 53418d5820ac5fe686da000f652f3331f8e0d9cb7407c34d2c3c8126ff476314
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment

The PDF was identified as an image-only lure, a common phishing technique where a visual deception hides a clickable link. The heuristic 'PDF_ESCAPED_URI_IMAGE_LURE' specifically highlights a clickable URL embedded within the PDF content, which is the primary indicator of malicious intent. The ML classifier further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8485

Heuristics 2

  • Image-heavy PDF hides clickable URL with PDF string escapes high PDF_ESCAPED_URI_IMAGE_LURE
    PDF is image-heavy with little real text and its clickable HTTP(S) URI is encoded with PDF octal escapes. This combination is common in credential-phishing PDFs that render a screenshot-like prompt and obscure the destination from simple URL extractors.
  • 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 200 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.