Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd61aff1962c3a6…

MALICIOUS

PDF

44.2 KB Created: 2021-05-16 17:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-26
MD5: 6e8bf85634ed7538e69a168dae84e20d SHA-1: b451f63eb2e8f50d513eede8f66284e8ecfbc60c SHA-256: 3dd61aff1962c3a653d2b6c08040c92bb3d27493ea8e5607f69dc220d2116a79
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hacks-for-roblox-prison-life-game-hack In PDF document text
    • http://per-bittner.de/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://per-bittner.de/images/websites-that-give-free-robux_GM431946152.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_off00004a5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5B 27896 bytes
SHA-256: 8b9a6307c6e31d74eca2057477625e55299bb68e6450fbd01613611f2f45665f
font_01_sfnt_off000089af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 18620 bytes
SHA-256: e3f2ecfa212854396a9435be993bd19ffc5a7ead26ebe64f65252827dfac6040

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