Malicious PDF — malware analysis report

Static analysis result for SHA-256 af25b42c3ac1715a…

MALICIOUS

PDF

32.5 KB Created: 2021-07-06 03:15:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 79c6f23394a7c5f701dc293f3729a42d SHA-1: ae90e0f895206b79b30850956765322a4cbc297e SHA-256: af25b42c3ac1715affd5f0f61c70899f02cff185b127a55ae45e227adff1f4e8
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-lovenet-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/legends-of-speed-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-bc-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/undertale-monster-vs-human-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-robux-but-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-in-the-computer_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-speed-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-2021-working_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_off00002a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A04 22016 bytes
SHA-256: fa7ae5ae29705e7bfc3af9ff8661c372f05d20c7a7c0a78b42e1d394cfea75b4
font_01_sfnt_off00005aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFF 18704 bytes
SHA-256: 36552c55d6b01c3633473854ce8ec45091a4a8a9b855d0711e20b63456f47980

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