Malicious PDF — malware analysis report

Static analysis result for SHA-256 71958d9c2d540b5b…

MALICIOUS

PDF

30.5 KB Created: 2021-05-28 10:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fccf66cc86620669b6e1cb68e6008430 SHA-1: ba184a580ba8e657b1c9c6daff8084979098b52b SHA-256: 71958d9c2d540b5bebd6a8262883384e5c90eb77c35b95fce7ad163de3297a0e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing or malware delivery. It contains a single embedded URL that redirects through a URL shortener, prizon.page.link, which is a high-priority indicator. The file's structure and the presence of a clickable link strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1203

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 30 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/1ux2 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_off00005c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C74 15752 bytes
SHA-256: 3d33abb830913a72f4cbbc8022ea92d33d6c2cd282c6a0e4cd14de835f4472c6

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