Malicious PDF — malware analysis report

Static analysis result for SHA-256 624e90a808ac689a…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 02:52:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: 1dee930eba8c94ddc1f312cdf21c6a48 SHA-1: e78db31ac7068b9419fd2338b6dca4a6e96aba0a SHA-256: 624e90a808ac689ab58f57b44b39cd77840a44f03593f2b6f531a469863fb1d8
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.tw/app/431946152/how-to-earn-free-robux-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-hacked-bloxy_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-in-ice-mountain-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/fun-games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-free-asset_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-bc_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-items-by-inserting-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-hackhub-coin-master_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
font_00_sfnt_off00002fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAE 21676 bytes
SHA-256: 93e914b4007c511b26ec4912038f66c85eb915221274353055113a9db02ff162
font_01_sfnt_off00005f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 18880 bytes
SHA-256: a522bee010909c1dfdd5b814bfadf8c7715ebc59745b399d37c475b37c42e617