Malicious PDF — malware analysis report

Static analysis result for SHA-256 5726f3fdd88ba56b…

MALICIOUS

PDF

29.0 KB Created: 2021-05-28 10:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ef9d92a4c8164ce6095cae05fe106ec2 SHA-1: 7263c04aa9c86655a4e33ced64d15e3ab3cff451 SHA-256: 5726f3fdd88ba56b534711baa2a165d41d4802b418600e493ac9a208eb551b10
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 or malware distribution. It contains a hidden link through a URL shortener, which is a high-priority indicator of malicious intent. Although the document body is truncated and unreadable, the heuristics strongly suggest the purpose is to redirect the user to a malicious destination.

Machine Learning

  • Nyx PDF Classifier clean score 0.1552

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 29 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://mrizi.page.link/dGXM 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_off0000575d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x575D 15252 bytes
SHA-256: 5fc925885d7ec8dcb3dc1560ea2ae587cf66f8774e5f99c810696f33836412c8

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