Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8af4c4b799289d…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 00:56:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 7f8c865fa860bc9b2f743200a8194f96 SHA-1: d2974d9b51bf58a7832f6fb02c8d78d454390e5d SHA-256: 5d8af4c4b799289d9bad85a90c90778161e2bd7945f7b8f082d40ba387321895
220 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-hack-int-a-friends-roblox-account-game-hack In PDF document text
    • http://androidthai.in.th/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-roblox-hair-for-avatar_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-legends-of-speed-race-cheats_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-get-free-roubux-for-roblox_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/is-it-hacking-if-i-use-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-apoc-rising-cheat-code_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-sad-cheating-story-albert-he-cried-on-video_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/robux-hack-computer-no-app-download-computer_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/tiktok-free-prints_GM835599320.pdfIn PDF document text
    • http://androidthai.in.th/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/minecraft-mods-download-free_GM479516143.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_off00002f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56 21528 bytes
SHA-256: 60d324d6196b6643d7f5ad3482221b9a994fa6a72cee333ce1193f6cf1be2054
font_01_sfnt_off00005e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 19524 bytes
SHA-256: f4a937afb1dde603f9b867fdcee88c442eb92d739a7162717fcb700c28b0cca2