Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af413fc17b67c23…

MALICIOUS

PDF

34.0 KB Created: 2021-05-28 16:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cfce0fb3d28be71b384afc9fcee7d794 SHA-1: 07e207ba60fcfd295ae0170826c9a8c9c508c067 SHA-256: 2af413fc17b67c23e844a86d2c304a8e2d95a0809e96383733c26f9ee7e33de2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic to disguise malicious links behind a seemingly harmless image. The presence of a URL shortener further supports this, as it's often used to obscure the true destination. While the extracted URLs are marked as benign, the heuristic firings strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0048

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 33 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://datas.page.link/dL7x In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://lucasfonts.comMicrosoftIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 20380 bytes
SHA-256: 28d45aa0a462cc5270c4ccb77bbf3dbbab12fd6aba9ed4e4ce5006b10962281e

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