Malicious PDF — malware analysis report

Static analysis result for SHA-256 26357795405fdef5…

MALICIOUS

PDF

37.0 KB Created: 2021-05-24 18:03:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a97015e953ba3ee961c476df4141c2c SHA-1: 75a6ffb2d166a6ddc64a643f1a9aaa0a6efa94ab SHA-256: 26357795405fdef5347c57dd35cd683eaa91c93cb9c82e70718d1f8d838f0adf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators for popular games like Minecraft and Roblox. The document body and heuristics indicate a lure to download or access these "hacks", which ultimately redirects to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely leading to further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/479516143/minecraft-education-free-game-hack In PDF document text
    • http://www.visiblefilm.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F7 27804 bytes
SHA-256: 1d53c432fa3fc8494b309a69e68c25c267dc18cc1cee617b3d554be92aad08f0
font_01_sfnt_off00007038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7038 18024 bytes
SHA-256: 50b2d5ff22f0b3ffa840834f12cbec9953eabd3c4e347b5eb6eb3aff22325aed

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