Malicious PDF — malware analysis report

Static analysis result for SHA-256 245773110ab9cd24…

MALICIOUS

PDF

19.3 KB Created: 2021-05-28 10:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 872c08d96780a658fa5e5744c6aa9833 SHA-1: cb0568ebe6248c22b0ca731bdf65a809bdef125c SHA-256: 245773110ab9cd24a4d6c8af99264e43c00a14ad49c59969ffeb1410c82da4fc
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is an image-only PDF, a common lure technique to hide malicious content behind a visual element. It contains a link that utilizes a URL shortener, indicating an attempt to obscure the final destination, which is often malicious. While the URL shortener itself is marked benign, the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0873

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 19 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://znakudachi.page.link/vKWa 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_off00003a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A74 12252 bytes
SHA-256: 7047ac656bdd910df56af970f3f8867c00632fb4def36a85da96faccafae2e04

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