Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae16f0ffc3ff320…

MALICIOUS

PDF

33.0 KB Created: 2021-05-28 16:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9b8c539d778a7a5d365a45bc0e1cedd0 SHA-1: 0bc4146ad6ec2a19dc0580c7f36cefdfd9e35915 SHA-256: 4ae16f0ffc3ff3202859e790f34cb27ffb5ea5de8b13b668a488458080da8c67
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as an image-only PDF, a common technique for phishing lures where a visual representation masks a clickable element. The PDF contains a link that utilizes a URL shortener, indicating an attempt to obscure the final destination and potentially evade detection. The heuristics strongly suggest a phishing or scamming intent, typical of spearphishing attachments.

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 32 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://prizon.page.link/Z8fe 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_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 17152 bytes
SHA-256: b8fdf48eda3ef6266dd69074895426cb948d165eff8495f029e8a6680c60ce7a

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