Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6f90d902761eba…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 13:03:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: fde27e634dc30d334c830660614e051b SHA-1: 0137f5da4ada3689acf53287c42bbe78df932a7f SHA-256: 2b6f90d902761eba9eb10748adefd99a3775de95d941710056d817b9f6cfaed8
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-hack-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-your-own-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hoe-to-het-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-gift-card-numbers_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-quiz-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pubg-uc-xtrcom_GM1330123889.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-anyones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-roblox-windows-10-magnet-simulator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-do-you-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-by-inspecting-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-games-hack-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/mac-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-afk-saber-simulator-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/august-2021-free-robux-legit_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-giver_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_off00002ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA0 22412 bytes
SHA-256: e7386635a664fb6120dab99885a04ae8c0eaa26f747e0e83c4f45ae9cbe63351
font_01_sfnt_off00005e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 18656 bytes
SHA-256: 999563e5ceb90bacb24403d8989521a1fbef177d0399db3bbb86b28fcd553b17

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