Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bd02babbe875af…

MALICIOUS

PDF

12.6 KB Created: 2021-10-16 09:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 41ba2d46425a81b460d16cf851b14282 SHA-1: e65ba30dc779879fa03d99f1fd6d9500798e8717 SHA-256: e8bd02babbe875af776fd8b35e6d0c3c47f44ff552096230986985a0b6803d9b
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains only an image, a common tactic for phishing lures. It includes a deceptive link to 'yughcendeservlce.premmise.ru', which is a typosquatted domain, indicating a phishing attempt. The file's structure and the presence of a deceptive URL strongly suggest it's part of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0063

Heuristics 4

  • Image-only PDF lure links to a deceptive (typosquat) host high PDF_IMAGE_LURE_DECEPTIVE_HOST_LINK
    PDF is image-heavy with little real text and its clickable action targets a host that impersonates a security/service/brand word with a look-alike homoglyph substitution — a digit OR a confusable letter (e.g. 'serv1ce', 'servlce', 'upd4te', 'm1cr0s0ft') — on a domain that is not a known-good site. This is a credential-phishing / fake-update carrier shape: a screenshot-like page funnels the victim to a deceptive look-alike destination.
  • 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 12 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://yughcendeservlce.premmise.ru PDF link annotation

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1674 6800 bytes
SHA-256: ee92fba61e9c4079af5235dedf8061ade9f9dc3361951c6e893536e80228e53a
font_01_sfnt_off0000273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x273B 2828 bytes
SHA-256: 18b7f5b19c0937289a672192218e7093aad6fbb16eb981021ccaab63acb9e7bb

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