Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1f0ab43027fdfb…

MALICIOUS

PDF

26.0 KB Created: 2021-05-28 16:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3d1c7b64af1a1d61a29cbfddb8952c66 SHA-1: 21eaad40e4debbd2563c11b40ebfbf60c199659d SHA-256: de1f0ab43027fdfbf4bb0a7aeee05a7fe156c7b237cda15538f9fd52c1ccef26
122 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 campaigns. It contains a clickable link that redirects through a URL shortener, likely leading to a malicious website. ClamAV also flagged this file as a phishing PDF.

Machine Learning

  • Nyx PDF Classifier clean score 0.0086

Heuristics 4

  • ClamAV: Pdf.Phishing.Nude0006210-9873172-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Nude0006210-9873172-0
  • Image-only PDF lure links through URL shortener high PDF_IMAGE_LURE_SHORTENER_LINK
    PDF is image-heavy with little real text and its clickable action points to a URL shortener. This is a high-confidence credential-phishing carrier shape: the visible page is a screenshot-like prompt while the destination is hidden behind redirect infrastructure.
  • 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 26 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://msen.page.link/LrhJ In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x459F 17152 bytes
SHA-256: b8fdf48eda3ef6266dd69074895426cb948d165eff8495f029e8a6680c60ce7a

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