Malicious PDF — malware analysis report

Static analysis result for SHA-256 287c3038040eb2d4…

MALICIOUS

PDF

33.2 KB Created: 2021-07-19 03:25:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 508d857c37a0253620e4e8e5f0c25e95 SHA-1: da3fc7e140787a35356a8518bc03f74ed44d8c97 SHA-256: 287c3038040eb2d4c3d09f38d34b5cc7968e9c363bb1ee80a1c88c193f90a57c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free game hacks and currency generators. The document body and embedded URLs strongly suggest a phishing or scam lure, aiming to redirect users to potentially harmful websites. No scripts were extracted, but the heuristic firings indicate a clear intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://netcdn.tw/app/431946152/rbxfree-com-free-robux-game-hack In PDF document text
    • https://samfora.de/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://samfora.de/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://samfora.de/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://samfora.de/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://samfora.de/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://samfora.de/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://samfora.de/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://samfora.de/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://samfora.de/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C41 22892 bytes
SHA-256: dd4bd55e52d9be765c744744f111652de98f24d54770a984798f91900fa33b73
font_01_sfnt_off00005f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6D 18460 bytes
SHA-256: 96a7f2ecb1645bf28582e424beb12dfc4726f5935c17c98ff40042140a6bccec

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