Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3907bad40cd96f3…

MALICIOUS

PDF

22.0 KB Created: 2021-05-28 10:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3956b46c737ca76d9db5358d9560488a SHA-1: 07a5c9a871ea85a3fadcbff5bcbd1a4c8e7bd0ac SHA-256: f3907bad40cd96f3a1c69dfd515b5988b14b7d573551db31f51f080e73dc4edc
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that functions as an image-based lure, presenting a screenshot as the content and embedding a clickable action. This action redirects to a URL shortener, a common tactic for phishing or delivering malicious payloads. The PDF structure and the use of a URL shortener strongly suggest a malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.1241

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 22 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://dlydruzei.page.link/H3Ed 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_off00003ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AE6 15444 bytes
SHA-256: 59d270b88c4e4fb8e9b2b94b9247e47fe59e15b7da67c3c0af07e8e1fd8edfc2

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