Malicious PDF — malware analysis report

Static analysis result for SHA-256 4786ecf17a45f6f3…

MALICIOUS

PDF

44.2 KB Created: 2021-05-15 01:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: e241ef210ffc84ce257aa6c6d96efa16 SHA-1: 079498af8ee137f8f4eecf168cd9016d288d6132 SHA-256: 4786ecf17a45f6f37025908f4b1546b587c3e5724848edcf4b0ba80455246919
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coinmasterdailyfreespins-com-game-hack In PDF document text
    • http://uctovnictvosnv.sk/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-human-verification_GM431946152.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_off0000470a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x470A 25048 bytes
SHA-256: 9361b28462e800242ad95acff46c88cc0be08a1d5f49e337427a21ae1ded6a21
font_01_sfnt_off00008004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000089a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 18412 bytes
SHA-256: e2599cc8a892eefc31c10bac6f2183dab570b4c76225f1f1bdeb83a3d04eb4f4

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