Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d861a3661f975fb…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 02:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 8346518f0e4ad76c2b2ab13a6253f54d SHA-1: eb9defbf14b303f6d39b648b3396e0149c84381a SHA-256: 5d861a3661f975fb16188d47b3a4eaa9dbf6a400b2788b1df3281904feaf53cb
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.co/app/431946152/roblox-group-free-clothes-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-roblox-game-creation-code_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-on-tor_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-a-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/pokemon-go-free-yamask_GM1094591345.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-noclip-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.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_off00003187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3187 22892 bytes
SHA-256: 8c4ffd3d5087fd57a13d038e14a7cb2105ce653ba85200adbae17265c628eecb
font_01_sfnt_off00006510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 19236 bytes
SHA-256: 538ac6444d1b2898d1c603ae67241d8332761ba289ed6b769b72ce6ef9c07f8b

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