Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2d58e22b3bfb21…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 02:26:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 101d66ec915dbdb8368f0d99f4ed90ef SHA-1: 99a54177c853b3a2d68352068c63e7dd69824f61 SHA-256: af2d58e22b3bfb21977a6c2dcd12eecaeea2b44697198535fee27be81b450172
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/free-robux-quiz-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-from-coin-master_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
stream_004_off00005357.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5357 27280 bytes
SHA-256: f57b45b7be893583be3a9a567d7b74e58ee5fbf1a66552e24b694aeca0acad44
font_01_sfnt_off000092d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D9 18376 bytes
SHA-256: b52519a3f27e6183245bec6d77d3cda93d913202ea7147b0d6d9048d316cd5fc

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