Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b49a8d680d18786…

MALICIOUS

PDF

40.5 KB Created: 2021-05-19 13:25:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 98ce3969a2ca64c9bb0346e8df26e3aa SHA-1: 8cca63bf546b31f463458133e560df0d8d699f74 SHA-256: 6b49a8d680d1878629bfc8e4328516bee9539f31149d16953632f5d71da7c220
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous embedded URLs and a heuristic firing for a browser installation lure, indicating a social engineering attempt to trick the user into downloading malicious content. The document body, though heavily obfuscated, contains references to game hacks and cheats, reinforcing the lure. The presence of embedded JavaScript, though not directly analyzed for specific actions, suggests the potential for further malicious activity upon user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/tiktok-free-crown.com-game-hack
    • https://dentmate.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-heaven-free-spins_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/android-coin-master-hack-2021_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-hack-no-download_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/free-daily-spins-from-coin-master_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/youtube-how-to-get-free-robux_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/get-robux-today_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-game-free-spin_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/robux-generators-that-actually-work_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/robux-gift-card-free_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-coin-hack_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/roblox-arsenal-hack_GM431946152.pdf
    • https://dentmate.com.tw/image/data/files/today-coin-master-free-coins-link_GM406889139.pdf
    • https://dentmate.com.tw/image/data/files/pokemon-go-free-40k_GM1094591345.pdf
    • https://dentmate.com.tw/image/data/files/coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004509.bin
7a764920b5c0e20677f09689224f54815ce3891b09910f8eeaa1542b325fa54d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4509 24432 bytes
font_01_sfnt_off00007d11.bin
3862743f5100ed4713949f71c78a6e5ee4aca795a059f917ecd0dd97ffdbd10d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 17948 bytes

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