Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf7f207639391c1…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 06:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95907bb558bfa599390e58e47014ac3d SHA-1: a0104bd47e50200c6fa0a854f5b896f6bc843570 SHA-256: 6cf7f207639391c19627e7ec452fecb265f2c463bd1a59bc546a47dc539a7429
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking malicious links, such as 'https://netcdn.xyz/app/431946152/promo-codes-for-free-robux-game-hack'. The presence of multiple URLs and the ML classifier's high confidence score indicate a malicious intent, likely to lead users to scam websites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/promo-codes-for-free-robux-game-hack
    • http://pustaka.bbppketindan.info//repository/websites-to-get-free-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-game-hack-app-download_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/roblox-avatar-com_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/roblox-hack-client_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-free-account_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/how-do-i-get-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-usa-2021_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/what-is-exploiting-in-roblox_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/free-robux-pin-codes_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/ac-market-coin-master-hack_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/earn-free-robux-today_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/minecraft-win-10-free_GM479516143.pdf
    • http://pustaka.bbppketindan.info//repository/my-roblox-account-was-hacked_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/easy-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049f6.bin
7c445ba385052dac8d3c8c9d8c47985ef38f68601dfec7d19fb635e285590239		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F6 28268 bytes
font_01_sfnt_off00008a57.bin
79f1ed749ebb86ed8378b1cb9aa6f559fb500c5101e3810faa0ee40136890037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A57 18604 bytes

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