Malicious PDF — malware analysis report

Static analysis result for SHA-256 d134b526e0a03456…

MALICIOUS

PDF

24.2 KB Created: 2020-10-02 08:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d7ffa53e24515d8f31dca90fb7f6829 SHA-1: 39733f49d2e7b33d3bb0b15877ec5981c56a28eb SHA-256: d134b526e0a03456a5b01605728f357b6161cdbfc4ea9b713aea1b9e138bd1e8
62 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.1050

Heuristics 4

  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 24 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://enotikmonika.premmise.ru/gaz/prom 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_off00004598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4598 13984 bytes
SHA-256: 78f2fe728d7a08270a1d663d7414ed077e7cd5d0e3c078ffb30cac99c9f70f7d