Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd81992b2494281…

MALICIOUS

PDF

9.1 KB Created: 2021-08-21 09:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 563c088e31a61080b744b1824e532174 SHA-1: f0c3ee85af9d048d7571a6ef05cbf2ca11a93446 SHA-256: 5fd81992b24942817b00fe52c94ed9af3eddb6aa331deb68e32b1dfab86f9dd8
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is image-heavy and small, containing a single malicious URL disguised as a clickable element. This is a common technique for phishing lures or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious, increasing confidence in its suspicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5519

Heuristics 3

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 9 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Image-only PDF lure with a single link to a non-reputable host medium PDF_IMAGE_LURE_NONREPUTABLE_LINK
    PDF is image-heavy with little real text and its only clickable action is a single external link to a host that is not known-good. This is the canonical malspam carrier shape — a screenshot-like 'click to view' page whose sole purpose is to funnel the victim to one redirect/landing URL on a compromised or throwaway domain. Flagged suspicious rather than malicious because the link alone (no shortener / typosquat / brand path) is the only corroborator beyond the image lure.
  • 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://glursmanashvili.infomail222.ru In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://lucasfonts.comMicrosoftIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn 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_off00000f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13 13384 bytes
SHA-256: 8923dc0b3d88ef7a6d2777a63ef3120913c27e70e7a1478ad4ba0b93a8bc171c

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