Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fe74e84950bedb…

MALICIOUS

PDF

43.5 KB Created: 2021-06-07 11:53:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2bd353cea5fd5ab12627dae1ff60ec9c SHA-1: 6a86919ccea2b4d3b756a90ed7ac0c9317b4da94 SHA-256: f5fe74e84950bedbb4a897faaeebb96abe162163098d0aff8eb664b61f953cbf
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It contains multiple embedded URLs pointing to sites offering game-related cheats or currency, suggesting a phishing or scam attempt. 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/free-vip-server-roblox-booga-booga-game-hack
    • http://inextpresident.com/images/real-robux-generator_GM431946152.pdf
    • http://inextpresident.com/images/rbx-free-robux_GM431946152.pdf
    • http://inextpresident.com/images/free-ways-to-get-robux_GM431946152.pdf
    • http://inextpresident.com/images/mathep_GM431946152.pdf
    • http://inextpresident.com/images/free-coin-master-account_GM406889139.pdf
    • http://inextpresident.com/images/new-free-money-links-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://inextpresident.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://inextpresident.com/images/how-to-send-free-spins-on-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/free-robux-no-verify_GM431946152.pdf
    • http://inextpresident.com/images/how-to-hack-robux-on-roblox-mobile_GM431946152.pdf
    • http://inextpresident.com/images/roblox-free-items_GM431946152.pdf
    • http://inextpresident.com/images/codes-to-get-free-robux_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-free-spin-best-link_GM406889139.pdf
    • http://inextpresident.com/images/robux-hacks-2021_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-hack-no-verification_GM406889139.pdf
    • http://inextpresident.com/images/free-coin-master-spins-link_GM406889139.pdf
    • http://inextpresident.com/images/free-likes-on-tiktok_GM835599320.pdf
    • http://inextpresident.com/images/how-to-play-minecraft-for-free-on-computer_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb4.bin
95ced6d1c3a61690af6da49f21bbbf2463032f2e8e9b33d99931f2971e28776b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB4 24520 bytes
font_01_sfnt_off000084f6.bin
049f835284e7ff6fcd0f693fb62e98987303797f65d7c3e25037697c4f43ea2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 19008 bytes

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