Malicious PDF — malware analysis report

Static analysis result for SHA-256 4784171d6a6b418a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 06:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 314793dc9477392c0a9d69017aa1273a SHA-1: ef5d0d4b3361a9708a8d6c671c7488ccab75fb12 SHA-256: 4784171d6a6b418a8eecd2adfdd2bddc65e15b6fa3df8f2281101ddbfe2fbc03
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/get-more-free-spins-on-coin-master-game-hack In PDF document text
    • http://uctovnictvosnv.sk/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-spins-fb-champion_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_003_off00004bb9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB9 24680 bytes
SHA-256: 44e818e5f232264ad048de089b71d2334ac25281516a2951b3d7926d9d9cf6d6
font_01_sfnt_off000083de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 17884 bytes
SHA-256: bb9e4fd9c75f82cb5aaa6c3ce0f9987e8b81c815dbd48b4f27d4577a82c32b67