Malicious PDF — malware analysis report

Static analysis result for SHA-256 696c3d4b3a93a458…

MALICIOUS

PDF

37.4 KB Created: 2021-07-05 11:21:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f1eddf2298814a04e47efc55103e8ad SHA-1: eeddbf928ca94b27e1967119348e4d137a904dc5 SHA-256: 696c3d4b3a93a458e96aeff56f679a5b8f1b05a0d683bded962a34e15020e8a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically advertising 'Coin Master Hack'. The embedded URL http://netcdn.tw/app/406889139/coin-master-hack-355-game-hack is identified as a known malicious redirector. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-hack-355-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-to-get-lots-of-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-legit-filmz_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-ninja-legends-cheat_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-apoc-hacks-2021-op_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/titan-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-synapse-x-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-exotics-in-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-wallpaper_GM479516143.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
font_00_sfnt_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 22996 bytes
SHA-256: d765b92ec36415e430cf658778a09776cfff8e0bc564bba91b01ba997a994a28
font_01_sfnt_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 18312 bytes
SHA-256: d85fcae918ae0577b30566467e9eb1c1b3d3ed93e6014f5cfab93d36950401f7