Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b67c3c770e0b44d…

MALICIOUS

PDF

42.6 KB Created: 2021-05-20 01:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: f5190970d157f7946d74a52ad52aa18f SHA-1: e6e3634278eb0d4283f0a5711db00e078e2f5429 SHA-256: 2b67c3c770e0b44d24476bc1c6f4c2255bf4686930034cd49e7861b2143e6b96
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-to-get-free-robux-on-mobile-game-hack In PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-website_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-fly-hack_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
stream_003_off000048fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FD 26236 bytes
SHA-256: 9f3d6d38f0729e2978c563f4a5c6601406159302ef832ddc3645f27391e5cd9d
font_01_sfnt_off000082f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 18672 bytes
SHA-256: 54aa4755d3d4fcbd00d11f20b69d4376192dec0a97bdc1376cf216d73564a968

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