Malicious PDF — malware analysis report

Static analysis result for SHA-256 1745fc33c62948bc…

MALICIOUS

PDF

78.2 KB Created: 2021-05-26 10:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7d744ee1b21304716f7e2e947830744b SHA-1: a5af28b2837eb481d5aaa3e6fa1206a5a3e4ade9 SHA-256: 1745fc33c62948bc5458edd9c6c1d1ac29a554f45a6cafa778773d3e958ae4b6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as an image-only lure, a common tactic for phishing or malware delivery. It contains a clickable action that redirects through a URL shortener, indicating an attempt to obscure the final destination. The heuristics strongly suggest this is a phishing or malware distribution lure, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier clean score 0.0211

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 78 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://newemusk.page.link/PRmN 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_off00011fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 14192 bytes
SHA-256: 59e6f1da3bf06a6aef4c262067c58b58832bb74a1c709365f751be707432024d

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