Malicious PDF — malware analysis report

Static analysis result for SHA-256 425453c3d12a75b0…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 14:45:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 214d0753cbf6447eb9a12d3a3321f2ca SHA-1: ffa23aabfb977f8032a7052337a5d4d6e46ac3ea SHA-256: 425453c3d12a75b06191f377a77fc3cfc0af22ffb75fdd82b3d85f0d77114cea
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/free-minecraft-website-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/getting-my-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-and-tickets_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-exploits-hacks-arsenal_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-be-a-hacker-in-roblox-like-john-doe_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/https-free-robux-cf_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/tiktok-free-up-space_GM835599320.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-block-piece-roblox-autofarm_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/best-hack-script-pack-for-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-do-you-get-free-roblox_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_off00002f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F48 22252 bytes
SHA-256: 4e37bb911b70c32b5b09f6a78162d550a1d7d27a017f2818354913b0f27babc0
font_01_sfnt_off00005fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFF 18212 bytes
SHA-256: 08e41d3b03130c2060aba57ba7a93c79e063729dc5ffe32466a4c949ad11576a

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