Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c0c34f93f90c7f…

MALICIOUS

PDF

17.3 KB Created: 2021-06-05 09:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 79ba1759c5386d0a1b7624f435aadd25 SHA-1: 07e9d300b20cb036c8c57e11b8392a0d9a67f1d6 SHA-256: 66c0c34f93f90c7fa607f59cb6097f4a5b973a9b3c0bb9b947b8a1b01df77ac0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that presents as an image, a common lure technique to hide clickable links. The heuristic 'PDF_IMAGE_LURE_SHORTENER_LINK' specifically identifies a URL shortener, indicating an attempt to obscure the final destination. This suggests the document is designed to lead the user to a malicious website, likely for phishing or a scam.

Machine Learning

  • Nyx PDF Classifier clean score 0.0657

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 17 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://cesokogo.page.link/w4UL 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_off00003230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3230 12396 bytes
SHA-256: 9651c78dad64c31681e27aaf77368dfa0aab65a72df78104afb2fc8edab34c59

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