Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f15cdc4b83d59cb…

MALICIOUS

PDF

31.5 KB Created: 2021-08-14 17:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e329dd0b9447a3bec3f8ee2b74ee2d63 SHA-1: e8746fdad2bce68b9b83c9595bdd732bdb4c3dd3 SHA-256: 9f15cdc4b83d59cbac907bdeaef8aa16b5e1f0efbfdc960e9fbfe38a67298e7e
64 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0860

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 31 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://avkr13.updta78-serv1ce.info PDF link annotation
    • http://www.microsoft.com/typography/ctfontshttp://fontfabrik.comMicrosoftIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 4584 bytes
SHA-256: efd9c6a33a455ad3bed317865347c6c2023c8ca55ae1a424004dac29cad2a1c9