Malicious PDF — malware analysis report

Static analysis result for SHA-256 30768af4189090ef…

MALICIOUS

PDF

24.5 KB Created: 2021-05-28 16:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 8fc7942e734062006de1017777f13155 SHA-1: 07cb26f8dc3fa7e41921a6d35fdcd0e719a0bd03 SHA-256: 30768af4189090efdad4b830870670cf7d249356281789983effe90fd71f255b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and the presence of a click-outward action. A critical heuristic specifically flags a URL shortener link, indicating a likely attempt to redirect the user to a malicious site. Although no scripts were extracted, the overall structure and heuristics strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.0052

Heuristics 4

  • ClamAV: Pdf.Phishing.Nude0006210-9873172-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Nude0006210-9873172-0
  • 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 24 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/DhHx 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_off000044ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44EF 15352 bytes
SHA-256: 80b151c7b4c124415ba8f6e55728d329057f2b894faad31d9541fe010992d5aa

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