Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc958221e41f249…

MALICIOUS

PDF

22.3 KB Created: 2021-05-28 10:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8043f70082c101200cc16a2c4be17788 SHA-1: 37e9e790ac2f58ab996bae02eca1d6b78e06c068 SHA-256: 4cc958221e41f249c7adf2315dd8172ba5e39907476cf84b168856754f4610e8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is an image-only lure, typical of phishing campaigns, which contains a clickable link disguised as a button. The embedded link, 'https://dlydruzei.page.link/eQb2', is obfuscated via a URL shortener, suggesting a malicious intent to redirect the user to a harmful site. The document also contains Russian text instructing the user to click the image, further supporting a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.1174

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/eQb2 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_off00003af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AF2 15776 bytes
SHA-256: 69255362af62ea912542a91f1ff081f8d5fa40d1fcb05ad321de4e86c9692255

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