Malicious PDF — malware analysis report

Static analysis result for SHA-256 7824f8ef0493c09d…

MALICIOUS

PDF

52.5 KB Created: 2021-06-11 04:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: e88516272b37901f1cb0371c7a7a9813 SHA-1: 56199c587e1436cab06081efb2b4a0fd8ea73af0 SHA-256: 7824f8ef0493c09d7e4e9ac966c158cd080b27bf6e1f3608e489b3ff3bc8f6b6
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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.tw/app/431946152/how-to-hack-roblox-on-mac-2021-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/hack-roblox-online-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-robux-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-any-model-for-free-on-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/long-pastel-hair-roblox-free-to-purchase_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-do-you-make-a-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-hack-inspect-element_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-bundle-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/qtx-v4-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-noclip-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-neon-district-hacking-how-to_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-obby_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_off000054d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D3 39668 bytes
SHA-256: a1d89e25ea013591e656e0cfd2d8e845c93666819bab8338c063c8c867b7fe77
font_01_sfnt_off0000a8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FB 18944 bytes
SHA-256: 31d86dbfa02c74f889e93ff8a8d44132e0a8becdbbeed40ceb788e716d32d7b3

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