Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af18c57fa59e5f6…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 11:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 0362f260b2443a682a77796f0669ed35 SHA-1: f3027a24b939947b7a2d802824d404da088b7eb1 SHA-256: 4af18c57fa59e5f671fa0b12d3f513e27dce57d2a0bb96acdb3abfbf76e974cf
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/do-you-get-ip-banned-in-roblox-if-you-hack-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hurt-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-ballon-simolator-gem-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-no-offers-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/did-biggie-get-robux-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-free-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-the-stuff-from-roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-coin-master-with-lucky-patcher_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_off00003144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3144 22036 bytes
SHA-256: d0156a8e6ba03765bdf4e191bd18b5b6cd599ab8c5b714e7bdd611aedb56d6da
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 19580 bytes
SHA-256: f8074137b858b128f9920b233948e3720d3441bb90890bb66928cdf79dd2f1b1

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