Malicious PDF — malware analysis report

Static analysis result for SHA-256 674b117183296893…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 18:47:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f134b0cea04d72f0430dfcb778463b3b SHA-1: 0d511af19ebdc867b17a9aa671d9f29462feb785 SHA-256: 674b117183296893028049f7f6ebc69d37bdf2de97c6e028493dd8ff51b9c0ff
82 Risk Score

Malware Insights

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

The ML classifier and heuristics indicate this PDF is malicious, specifically flagging it as a fake CAPTCHA lure. The document body and embedded URLs suggest a theme of 'free Robux' or game hacks, likely to trick users into clicking a link. The primary URL, https://netcdn.xyz/app/431946152/roblox-promo-codes-for-free-robux-game-hack, is likely the initial download point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-promo-codes-for-free-robux-game-hack
    • http://getthelook-bkk.com/images/can-you-download-minecraft-for-free_GM479516143.pdf
    • http://getthelook-bkk.com/images/hack-version-of-coin-master_GM406889139.pdf
    • http://getthelook-bkk.com/images/moon-active_GM406889139.pdf
    • http://getthelook-bkk.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://getthelook-bkk.com/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://getthelook-bkk.com/images/free-robux-hack-2021_GM431946152.pdf
    • http://getthelook-bkk.com/images/pasos-para-hackear-coins-master_GM406889139.pdf
    • http://getthelook-bkk.com/images/free-spin-coin-master-twitter_GM406889139.pdf
    • http://getthelook-bkk.com/images/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://getthelook-bkk.com/images/minecraft-hacks-wurst_GM479516143.pdf
    • http://getthelook-bkk.com/images/coin-master-hacker-club_GM406889139.pdf
    • http://getthelook-bkk.com/images/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://getthelook-bkk.com/images/coin-master-free-generator_GM406889139.pdf
    • http://getthelook-bkk.com/images/minecraft-survival-hacks_GM479516143.pdf
    • http://getthelook-bkk.com/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://getthelook-bkk.com/images/www-cheatsk-com-coin-master-hack_GM406889139.pdf
    • http://getthelook-bkk.com/images/free-robux-codes-2021_GM431946152.pdf
    • http://getthelook-bkk.com/images/roblox-tracker_GM431946152.pdf
    • http://getthelook-bkk.com/images/minecraft-tower-defense-2-hacked_GM479516143.pdf
    • http://getthelook-bkk.com/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004952.bin
8d99be3fad046055e7e91147254885fd9c76c46c3d768e46edbdd5fcba259b5f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4952 24804 bytes
font_01_sfnt_off0000828f.bin
3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828F 18676 bytes

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