Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2921b1dd193756d…

MALICIOUS

PDF

39.1 KB Created: 2021-05-28 16:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff216ee5892e758f228c6d722fca7be6 SHA-1: 3e8e38e28086a57b24f5392357683ae8cd59a247 SHA-256: c2921b1dd193756da90424dff84e3abb35bf1f700ca8edc9e27f6f77cf9a2463
62 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. It contains a clickable action that directs to a URL shortener, dlydruzei.page.link/nRXv. While the URL shortener itself is marked benign, the heuristic indicates this is a typical shape for a phishing lure where the shortened link ultimately leads to a malicious destination. No scripts were extracted, but the overall structure suggests an attempt to trick the user into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0048

Heuristics 3

  • 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 39 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://dlydruzei.page.link/nRXv 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_off00007f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F39 15352 bytes
SHA-256: 80b151c7b4c124415ba8f6e55728d329057f2b894faad31d9541fe010992d5aa

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