Malicious PDF — malware analysis report

Static analysis result for SHA-256 2316c2896fd3a42a…

MALICIOUS

PDF

45.1 KB Created: 2021-05-20 23:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f1bc7031d845b31112a0a1f8fa8b785d SHA-1: 513f3871f698c466658d9357aaf7ec41b6d42f09 SHA-256: 2316c2896fd3a42ad0d214346221fb404f1bfba051e738a31d6e7bf0700a9039
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 and a prominent download button, directing users to external URLs that likely host malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful files. The document body text and embedded URLs suggest a lure related to game hacks, specifically for Roblox.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7955

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/roblox-arsenal-hacks-download-game-hack
    • http://kita-sunshine.de/images/roblox-rape-hack_GM431946152.pdf
    • http://kita-sunshine.de/images/rbl-gg-free-robux_GM431946152.pdf
    • http://kita-sunshine.de/images/free-robux-hack-2021_GM431946152.pdf
    • http://kita-sunshine.de/images/all-minecraft-handbooks_GM479516143.pdf
    • http://kita-sunshine.de/images/but-link-says-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034f6.bin
05a2bc82563916eef4f4c1ade6494bdd5996b0fdd49b565cd907ce169592e52b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F6 26740 bytes
font_01_sfnt_off000073b7.bin
22028b0ee8ce177bd2524c13d2b6b5c78cfc8c16bbd7055342bb3a03a6ab0a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B7 3748 bytes
font_02_sfnt_off00008015.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 5696 bytes
font_03_sfnt_off00008d26.bin
3194e743087210276cc8ef30afa20718d77c17967e4a232ddce90cfa751f40c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D26 18688 bytes

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