Malicious PDF — malware analysis report

Static analysis result for SHA-256 49921b722b763889…

MALICIOUS

PDF

44.6 KB Created: 2021-06-02 12:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 912834f2636d6764c7d1456082349186 SHA-1: e07888025bc1de29282f1d27313f6b8452740297 SHA-256: 49921b722b76388994af0b9899065e3fbf3d2f71a5f2a731c6cdc7df16fb2361
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, aiming to trick users into downloading a payload. The embedded URL points to a resource that likely hosts further malicious content, possibly a game hack or exploit. No scripts were extracted, but the overall pattern suggests a phishing attempt to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/earn-free-robux-roblox-game-game-hack
    • http://neltalen.nl/images/free-robux-com-no-verification_GM431946152.pdf
    • http://neltalen.nl/images/blogger-coin-master-free-spins_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-apk-hack-2021_GM406889139.pdf
    • http://neltalen.nl/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://neltalen.nl/images/minecraft-windows-10-edition-hacks_GM479516143.pdf
    • http://neltalen.nl/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://neltalen.nl/images/minecraft-hacks-pc_GM479516143.pdf
    • http://neltalen.nl/images/get-free-roblox_GM431946152.pdf
    • http://neltalen.nl/images/hack-my-game-xyz-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/roblox-vehicle-simulator-money-cheat-engine_GM431946152.pdf
    • http://neltalen.nl/images/robux-hack-me_GM431946152.pdf
    • http://neltalen.nl/images/roblox-pink-free-robux_GM431946152.pdf
    • http://neltalen.nl/images/free-tiktok-likes_GM835599320.pdf
    • http://neltalen.nl/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://neltalen.nl/images/how-to-play-minecraft-for-free_GM479516143.pdf
    • http://neltalen.nl/images/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • http://neltalen.nl/images/robux-best_GM431946152.pdf
    • http://neltalen.nl/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • http://neltalen.nl/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://neltalen.nl/images/roblox-hacks-for-mac_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e87.bin
2808d9adceeda57f76cd5097d930dfd70d2b29ffacd315fb52facb26f3b494f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E87 26740 bytes
font_01_sfnt_off00008b14.bin
2e7c10b74943c7f85777cd58e3ab9985d911e7c35e084fb088479d6a101d698b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 18576 bytes

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