Malicious PDF — malware analysis report

Static analysis result for SHA-256 478a6356ee5f6ffc…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 11:27:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: f4e1c5f9539c00a144aafd0b24c8274a SHA-1: 7beea602e2effa621560da51a8963e70597cee0c SHA-256: 478a6356ee5f6ffce4e35969c180e46ebb63580dd4cff8451b6c6f0e33a0e1ae
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/free-robux-easy-and-fast-game-hack In PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-robux-easy-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-games-pastebin-roblox-apocalypse-rising-2_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/roblox-cheats-club_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-put-cheat-codes-roblox-bubble-gum_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-cheat-in-roblox-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-get-free-coins-in-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/getrobux-now_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_off000031b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B1 22768 bytes
SHA-256: 3a82b2c9f8b3e0755e97fb0c38e1b2ebdd6c7563233fda768a05516e66e36d93
font_01_sfnt_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 19172 bytes
SHA-256: e478a87f33177f62414f41e8523dd2647ca5964d0e32b68d8766533df2c128b7

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