Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b02f059a080bdb…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 00:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1983d407e21a69ffb9369abd751b50ac SHA-1: 75144d451e7a3f5b710c12e164ff1f6b52527bde SHA-256: 35b02f059a080bdbe9edcb8098065a7bb8975cb642e762b0e8c62685334f3db8
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a visual download button, designed to trick the user into downloading a potentially malicious file. The embedded URLs point to various game-related cheat or hack pages, suggesting a lure for users seeking such content. 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/roblox-wanted-money-hack-game-hack
    • http://bit-sky.com/images/coin-master-hack-blog_GM406889139.pdf
    • http://bit-sky.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://bit-sky.com/images/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://bit-sky.com/images/minecraft-toolbox-premium-apk_GM479516143.pdf
    • http://bit-sky.com/images/roblox-chat-cheats_GM431946152.pdf
    • http://bit-sky.com/images/roblox-with-commands-hack_GM431946152.pdf
    • http://bit-sky.com/images/free-roblox-shirts-templates_GM431946152.pdf
    • http://bit-sky.com/images/roblox-free-robux-codes_GM431946152.pdf
    • http://bit-sky.com/images/coin-master-hack-spin-160-pro_GM406889139.pdf
    • http://bit-sky.com/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://bit-sky.com/images/free-coin-master-s_GM406889139.pdf
    • http://bit-sky.com/images/how-to-get-cheat-engine-roblox_GM431946152.pdf
    • http://bit-sky.com/images/roblox-games-free-online-to-play_GM431946152.pdf
    • http://bit-sky.com/images/free-robux-real-roblox_GM431946152.pdf
    • http://bit-sky.com/images/robux-today_GM431946152.pdf
    • http://bit-sky.com/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://bit-sky.com/images/free-coin-master-game_GM406889139.pdf
    • http://bit-sky.com/images/royal-high-school-roblox-how-to-gwet-free-mony_GM431946152.pdf
    • http://bit-sky.com/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://bit-sky.com/images/free-builders-club-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005168.bin
ead844a000efcf90f373327256b536cfb7821fc707f3897a14664ebc16f9540d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5168 26068 bytes
font_01_sfnt_off00008ac1.bin
b2ca2030bd4c37f6927ffb84e0d38608d1f1ebfb7d5ffab2f050b6e8bb4494e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC1 19032 bytes

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