Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b5a8ee59d6413…

MALICIOUS

PDF

38.8 KB Created: 2021-05-24 01:19:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49f1628461928ad5529e79a33b4e13d1 SHA-1: ecacb956f78d3cc18d8adb5908b8b2eea02ee0da SHA-256: e40b5a8ee59d64136832b9fd3cb8e71883c8972a69671b5bbe91dbc73326a04c
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a prominent call-to-action to "CLICK HERE TO ACCESS ROBLOX GENERATOR", directing users to a malicious URL. The presence of multiple suspicious URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/rblx-gg-free-robux-game-hack
    • http://septik-centr76.ru/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://septik-centr76.ru/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://septik-centr76.ru/images/how-to-get-robux_GM431946152.pdf
    • http://septik-centr76.ru/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://septik-centr76.ru/images/coin-master-2021-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ca.bin
86701cb099f537b484a2822173b1e8ecdd54c02f489e092bc4d8bbac8adc8c33		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32CA 24768 bytes
font_01_sfnt_off00006bbd.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBD 2940 bytes
font_02_sfnt_off000075cd.bin
79d8ff6bb54f2bd25fce5899da6b269aa8d0d1da5a030d2c5dfc49c812010b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 18376 bytes

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