Malicious PDF — malware analysis report

Static analysis result for SHA-256 793c238220a4e565…

MALICIOUS

PDF

47.7 KB Created: 2021-05-16 22:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-14
MD5: f4a8283c04cbf9184b70f6cece7bd119 SHA-1: dddfedf603fd9d192bc0b3431593ee05a60e4fdd SHA-256: 793c238220a4e565bf1df17e03b8b84d1b59624315e4df3760b446f47a94cf57
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-2021-easy-game-hack In PDF document text
    • https://www.bumbar-sport.hr/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/www-robux_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.bumbar-sport.hr/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB9 25932 bytes
SHA-256: 65288b7c51c571ce697c96e220a684e7fb98d786d2dd4dbe11c9bda9bddbbaab
font_01_sfnt_off000086aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AA 4504 bytes
SHA-256: 44a465c881a3b34323e7be5d6dff5b4dc59dad8754f48cad4bd04fa11df7c432
font_02_sfnt_off000094d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D8 19172 bytes
SHA-256: 0a4c192dd0d49b475d670e2028b2e3d9bc88486e58824ff416e2d46c0acce708

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