Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32330cff453dac7…

MALICIOUS

PDF

22.1 KB Created: 2021-05-28 10:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c569d5e22da342c0f5f849866bc5ea4f SHA-1: 52fafbe29a13bc30dde707dcdcc4518fbd4f7f56 SHA-256: a32330cff453dac74b7078d1f833a1a9bfc13fa9698f83618dc6de73d5220cad
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as an image-based lure, containing minimal text and a single image designed to trick users into clicking a link. The embedded URL, https://volde.page.link/gs5e, is a URL shortener, which is commonly used to obscure malicious destinations. The document body contains Russian text that translates to "BY CLICKING ON THE PICTURE, THREE ATTEMPTS ARE WAITING FOR YOU WHICH WE ARE GIVING YOU", further reinforcing the lure aspect. While no scripts were explicitly extracted, the PDF structure and the presence of an action trigger suggest potential for embedded JavaScript or other executable content, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier clean score 0.1241

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 22 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://volde.page.link/gs5e 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_off00003b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B14 15632 bytes
SHA-256: 0b922d707b3b22ead759d8f0340e3dc19871c327e2f05237b18db180a24239fe

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