Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6be554825bf9471…

MALICIOUS

PDF

47.1 KB Created: 2021-06-13 20:46:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0e95a419c8bc12b32b155ebba1fe83b SHA-1: 63003423fecefd01f3765a057861728831549888 SHA-256: c6be554825bf94719161b27ce85f4de309debe6346b8d3e3c38ddb23073c52a9
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick users into interacting with malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/cch-ly-robux-free-de-nhat-game-hack, likely lead to the download of a second-stage payload. The document's content and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 http://netcdn.co/app/431946152/cch-ly-robux-free-de-nhat-game-hack
    • http://magnipsor.su/images/roblox-studio-free-robux_GM431946152.pdf
    • http://magnipsor.su/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://magnipsor.su/images/robux-today_GM431946152.pdf
    • http://magnipsor.su/images/coin-master-game-hunter_GM406889139.pdf
    • http://magnipsor.su/images/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://magnipsor.su/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdf
    • http://magnipsor.su/images/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://magnipsor.su/images/roblox-catalog-free_GM431946152.pdf
    • http://magnipsor.su/images/minecraft-mobile-free_GM479516143.pdf
    • http://magnipsor.su/images/free-girl-faces-on-roblox_GM431946152.pdf
    • http://magnipsor.su/images/free-ways-to-get-robux_GM431946152.pdf
    • http://magnipsor.su/images/comment-avoir-2021-kills-cheat-sur-knife-ability-test-roblox_GM431946152.pdf
    • http://magnipsor.su/images/roblox-hack-com_GM431946152.pdf
    • http://magnipsor.su/images/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://magnipsor.su/images/free-robux-without-doing-anything_GM431946152.pdf
    • http://magnipsor.su/images/play-games-for-robux_GM431946152.pdf
    • http://magnipsor.su/images/free-robux-easy_GM431946152.pdf
    • http://magnipsor.su/images/free-daily-spin-coin-master-game_GM406889139.pdf
    • http://magnipsor.su/images/free-minecraft-shaders_GM479516143.pdf
    • http://magnipsor.su/images/coin-master-fan-club_GM406889139.pdf
    • https://rblx.land
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ca.bin
965560f914d35f143a7a81834f81160b2bcf7c393809b75ced193147aa8414d5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CA 28108 bytes
font_01_sfnt_off000089df.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DF 2940 bytes
font_02_sfnt_off000093ee.bin
f010bfbced7a1415633961b9b87e1d20b0b5e6b02a8022130839f9942649845d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 18860 bytes

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