Malicious PDF — malware analysis report

Static analysis result for SHA-256 7821ad92a2cdb09d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 13:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 9e37089601a9b21167722a896f2b9a8f SHA-1: a7dfc3f1bd918fbe9bc5d29b2dbd3f5ee4b25f55 SHA-256: 7821ad92a2cdb09d14d6de396623fa840ce06e8a758dbfd14748ab46070d773a
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/479516143/minecraft-creative-mode-free-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-games-that-has-roblox-in-it_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/123-free-robux-is-this-a-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/admin-command-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-account-searcher_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-use-hack-on-roblox-with-admin_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-tower-deffense_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-hack-on-phone_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-yo-get-more-money-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-survey_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_off00003273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3273 22320 bytes
SHA-256: ef618f7ef24d596a1e349c5b17ff551f0d80b3d20167bca8f37be9810fb61fe8
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 18284 bytes
SHA-256: a8704dedbd7cd58198964eddd3b6cdb149a158e7fcc2c7dee362bc832501691c

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