Malicious PDF — malware analysis report

Static analysis result for SHA-256 4780a2c412d45628…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 06:20:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: fc8fd98880106d2c4b2fe42121c255c1 SHA-1: 5036911cc1924730ee9a8b469cd75d566c4dcd7a SHA-256: 4780a2c412d4562895e513eac9480035eb7cc0de821b2ca5ccf7d149d70a0322
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/406889139/coin-master-hack-pc-game-hack In PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-robux-only-need-username_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/download-portable-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/pubg-uc-2-all-pro_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/hack-in-counter-blox-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-redeem-codes-2021_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
stream_002_off00002efe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFE 22484 bytes
SHA-256: cdec34481ace4b2ae6abed7f22473fa284fedbd090823483606a5f8ff5c44e75
font_01_sfnt_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 18160 bytes
SHA-256: fd8dd7e41966129b00bd6faab6d015b3d95d63fef28ab848195abaaf238f8237

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