Malicious PDF — malware analysis report

Static analysis result for SHA-256 191000bbfbdccfec…

MALICIOUS

PDF

33.4 KB Created: 2021-06-28 14:18:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: e14b0d1c30afe4f297f2fbdfcb88c8e6 SHA-1: 7eb02eeee1c8646fb60b01fb7cec1840a1ae3eec SHA-256: 191000bbfbdccfec2b92ca363354a3414a2c85f50c0e26ca6d2f88e234f7df43
200 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/cheat-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://sd-olimp.hr/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-annoy-roblox-server-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/black-curls-hair-extension-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-coins-link-2021_GM406889139.pdfIn macro / runtime command snippet
    • https://www.sd-olimp.hr/files/roblox-skywars-money-hack_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-5-million-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-robux-without-using-apps_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_off00002c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C75 22140 bytes
SHA-256: b5a57e886d066bd5475f9020832921dbba63b4e05dbc9dd8eec1fed80cc488ba
font_01_sfnt_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 19060 bytes
SHA-256: 0bce0788bde3b749b991e1552017f8fb58b7f3195fee689d24b14f917dffef4a

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