Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e5f8ca2fc5bd26…

MALICIOUS

PDF

22.7 KB Created: 2021-05-28 10:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d63daf7623d44dfb7b310de82818b859 SHA-1: 5c7758c0e94209c66812a86a6a3e8fe25eb9ee6e SHA-256: a3e5f8ca2fc5bd2648f5cc894cca41065a74d61cfc645facae18b0a33a0c088b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is an image-only PDF designed as a lure, indicated by the PDF_IMAGE_LURE heuristic. It contains a single embedded URL that is shortened, suggesting an attempt to obscure the final destination. The PDF_IMAGE_LURE_SHORTENER_LINK heuristic confirms this, pointing to a URL shortener. While no scripts were extracted, the structure and heuristics strongly suggest a phishing or scam attempt where the user is expected to click the link to proceed.

Machine Learning

  • Nyx PDF Classifier clean score 0.1177

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/akTk In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AFF 12348 bytes
SHA-256: ba0cbf3439e91326dc2691b903cbda9d767eed5192e1c316cecee2091eb04b8e

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