Malicious PDF — malware analysis report

Static analysis result for SHA-256 4455dfb5daf5e022…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 07:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-11
MD5: 10304c03806b6fc9e59b87ead6e9113e SHA-1: d17e5d5c7cd34cff8c97828cb25e2e8e7145ef93 SHA-256: 4455dfb5daf5e02258f2859b61b41e6eb23e359e61ab4bb836ed0a3565f2c6ab
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/apps-that-give-you-free-robux-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-jailbreak-hack-bypassed_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/noclip-for-camera-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-pins-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-robux-hack-2021-august_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/cheat-engine-64-roblox-hacks_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_off000030b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B4 22276 bytes
SHA-256: 93e1c6a589c77d2bdd28a011d6968a5b3dd59829218198e5e903f297ff165b2d
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 19560 bytes
SHA-256: 44687920bbab424739eb00f0c10a6a4a3701389ccd8aaf990bb054a3fc46e25a

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