Malicious PDF — malware analysis report

Static analysis result for SHA-256 636289e6362f9cb8…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 05:04:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 75329a27a6287ddf01e110c523a31387 SHA-1: eea759d135c826a30bdf54c2aa139430a1710e4e SHA-256: 636289e6362f9cb8b27d3e7d0d4d2ea7a344eaaf50de7c032878921b253e4740
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free currency for popular games like Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/games-to-get-free-robux-on-roblox-game-hack, is identified as a redirector for game hacks. This suggests the document's purpose is to trick users into visiting malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/games-to-get-free-robux-on-roblox-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-ro-port-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-ajuto-clicker-is-it-a-cheat_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-a-free-gravity-coil-in-all-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/nopde-engine-lua-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-hack-2021-december_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/claim-free-spins-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_off00003132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 21928 bytes
SHA-256: ad11147675b473799521d633f3260cc1d1400aa4538cb0241275666576a115d3
font_01_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 19152 bytes
SHA-256: c9b8c12e14cac7d78d85b5c99de27663965a41e9f6f85791a5bd67aa85dc2391

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