Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d6c7759a21cad8…

MALICIOUS

PDF

38.0 KB Created: 2021-05-26 10:38:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f00b0f5be62c65d13b6351eb4de63dc4 SHA-1: a075c5eabf26fdbc637c6d4cdee929e2dd37ba81 SHA-256: 43d6c7759a21cad8d6e9e7d509065bbe25549af9de2205a58b465856ff045b13
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 single embedded URL that utilizes a URL shortener, which is a high-risk indicator. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not a typical user-created document. The primary attack vector appears to be directing the user to the shortened URL, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.0757

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 37 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://newselonm.page.link/1Gx6 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_off00007ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 14192 bytes
SHA-256: 59e6f1da3bf06a6aef4c262067c58b58832bb74a1c709365f751be707432024d

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