Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d075df25c06e377…

MALICIOUS

PDF

43.9 KB Created: 2021-06-08 13:40:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f9dbf7cc6511712cedaa73e22d0c0c20 SHA-1: d3ee88faeed20d7afbff3da41833274ec63bb04d SHA-256: 0d075df25c06e37711588824c6cc11f58d1375d6f0b106b34beacf37d92374f3
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It also contains embedded URLs that lead to pages offering hacks for games like Roblox, suggesting a lure for potentially malicious downloads or further exploitation. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/new-hack-roblox-game-hack
    • https://lesegais.ru/images/how-to-get-free-unlimited-robux_GM431946152.pdf
    • https://lesegais.ru/images/gamesofficenet-hack-coin-master_GM406889139.pdf
    • https://lesegais.ru/images/can-you-get-robux-for-free_GM431946152.pdf
    • https://lesegais.ru/images/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://lesegais.ru/images/coin-master-daily-spin-free_GM406889139.pdf
    • https://lesegais.ru/images/minecraft-free-download-unblocked_GM479516143.pdf
    • https://lesegais.ru/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • https://lesegais.ru/images/coin-master-free-shield-link_GM406889139.pdf
    • https://lesegais.ru/images/how-to-get-free-robux-com_GM431946152.pdf
    • https://lesegais.ru/images/minecraft-windows-10-mod-menu_GM479516143.pdf
    • https://lesegais.ru/images/master-coin-free-link_GM406889139.pdf
    • https://lesegais.ru/images/free-minecraft-account-generator_GM479516143.pdf
    • https://lesegais.ru/images/fedora-roblox-free_GM431946152.pdf
    • https://lesegais.ru/images/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://lesegais.ru/images/roblox-free-robux-com_GM431946152.pdf
    • https://lesegais.ru/images/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdf
    • https://lesegais.ru/images/minecraft-pe-free_GM479516143.pdf
    • https://lesegais.ru/images/robux-offers_GM431946152.pdf
    • https://lesegais.ru/images/download-a-free-generator-for-robux-no-website_GM431946152.pdf
    • https://lesegais.ru/images/get-free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004dbb.bin
39914a13d2add851b54f602ba9b30f233eefe9d1afe9988974c36ce1b8cdd194		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBB 25332 bytes
font_01_sfnt_off00008860.bin
781889c3ea532aa63fec8c9b79eb1b3f4177a74e9584fbec392c8084fe4998b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8860 18344 bytes

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