Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a889347629a60e1…

MALICIOUS

PDF

22.3 KB Created: 2021-05-28 10:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9eb17e43dac54c09c333407054045545 SHA-1: 0ed6f4ff3143b5b1056d9ab20e305a45fad045c8 SHA-256: 5a889347629a60e19ef711dd5d49a851002c56cef4b4f30944877764df363b65
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is an image-only lure, indicated by heuristics like PDF_IMAGE_LURE. It contains a shortened URL, https://znakudachi.page.link/AJB5, which is a common tactic for phishing or malware delivery. The document body text, though partially garbled, contains Russian text that translates to 'TODAY YOU ARE LUCKY CLICK ON THE PICTURE', further supporting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier clean score 0.1174

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://znakudachi.page.link/AJB5 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_off00003af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AF3 15776 bytes
SHA-256: 69255362af62ea912542a91f1ff081f8d5fa40d1fcb05ad321de4e86c9692255