Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31fb76330ebb7b3…

MALICIOUS

PDF

26.5 KB Created: 2021-05-28 10:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c024d6492e9da9d223cf8cd8c6811750 SHA-1: 273778da90749b372ec3d938722ed54fbd4ca086 SHA-256: b31fb76330ebb7b3a20f94ec9fa9a14aca4d809f33dd1bf86fa4e11d32069eb3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, containing a screenshot designed to trick users into clicking a link. The embedded URL, https://svimn.page.link/fu7j, is a URL shortener, commonly used in phishing campaigns to obscure the final destination. While the URL shortener itself is benign, its use in this context, combined with the image lure, strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1196

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 26 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://svimn.page.link/fu7j 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_off000056f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56F7 12396 bytes
SHA-256: 9651c78dad64c31681e27aaf77368dfa0aab65a72df78104afb2fc8edab34c59

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