Malicious PDF — malware analysis report

Static analysis result for SHA-256 47842af28f1ff2e1…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 07:12:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 8a6b7eb3c2900b3107cde3b3ecc296fb SHA-1: 400a862f7337d9aac92945523a36631249f76c11 SHA-256: 47842af28f1ff2e1edaa0c4369259275cd107166884e388ca17ecb4bc5cb3dde
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-free-robux-without-human-verification-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-free-robux-quick-survey_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/pokemon-go-free-8-generation_GM1094591345.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-lua-hacks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/comment-tlcharcher-un-cheat-sur-roblox-avec-explication_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/kill-all-prison-life-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-hack-link_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-lumber-tycoon-2-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-rb-world-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/compte-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-stream_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
font_00_sfnt_off000030a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A6 22496 bytes
SHA-256: 10eaf44a43005e4a43d385d7722d050e3642583bb8bcb61f09a46363471b3998
font_01_sfnt_off0000628a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 19860 bytes
SHA-256: 495fe8ab67ccc92980b130970b14ca59a4055a895de5252c8ccba287623abf67

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