Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9629c3c643bc21…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 00:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 17930732a57d612c87863cabb5febb81 SHA-1: e9b429e595a9ca31292770f1ed4fb05257783990 SHA-256: 9b9629c3c643bc21887fe2b115eb8adc70c826deac04a2b17e940c2c14d79fd5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA and a call-to-action to trick the user into downloading a game hack. It contains multiple embedded URLs pointing to various game-related download lures, with the primary URL being http://netcdn.tw/app/479516143/minecraft-free-download-game-hack. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/479516143/minecraft-free-download-game-hack
    • http://esm-royet.de/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://esm-royet.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://esm-royet.de/images/minecraft-free-download-android_GM479516143.pdf
    • http://esm-royet.de/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://esm-royet.de/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://esm-royet.de/images/free-minecraft-capes_GM479516143.pdf
    • http://esm-royet.de/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://esm-royet.de/images/free-robux-without-downloading-apps_GM431946152.pdf
    • http://esm-royet.de/images/minecraft-games-free-download_GM479516143.pdf
    • http://esm-royet.de/images/classic-minecraft-net-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bbb.bin
22ae143b3c2088b073537d08a89b9bb771d95fdec9711c16f0e7298bf91e9a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBB 22588 bytes
font_01_sfnt_off00005e08.bin
eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E08 18292 bytes

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