Malicious PDF — malware analysis report

Static analysis result for SHA-256 329cc2de471499f8…

MALICIOUS

PDF

53.3 KB Created: 2021-05-26 10:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ec3b52d0404ea1d52851ba17cf8f3c66 SHA-1: 9dafb1493096a2685ed4e20baf9ec465a8a775ee SHA-256: 329cc2de471499f8d7934b3ead127270da2f64d9b7f3d074a99a5eccd126bcab
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic in phishing campaigns to disguise malicious links. The embedded URL, https://emuske.page.link/GM7K, is obfuscated via a URL shortener, increasing the likelihood of malicious intent. The file's structure and the presence of a link strongly suggest it's part of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.1279

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 53 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://emuske.page.link/GM7K 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_off0000bc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC40 14192 bytes
SHA-256: 59e6f1da3bf06a6aef4c262067c58b58832bb74a1c709365f751be707432024d

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