Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75af5b5d6dd256c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 20:46:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ddb78566a650ca21bc103b6929ea5062 SHA-1: 08408841d3bf8636a3ace7c38bc0195450d11101 SHA-256: f75af5b5d6dd256cc4686eeaf00a0d360cc8678c2bee6b92ba68e07e92835b89
82 Risk Score

Malware Insights

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

The document presents a lure for obtaining free in-game currency for Minecraft, directing users to a URL that likely hosts a malicious payload. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy and paste content into a command-line interface, suggesting an attempt to execute downloaded malware. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/how-to-get-minecoins-in-minecraft-for-free-game-hack
    • https://razredna-nastava.net/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://razredna-nastava.net/files/get-free-minecraft-account_GM479516143.pdf
    • http://razredna-nastava.net/files/coin-master-hack-mod_GM406889139.pdf
    • http://razredna-nastava.net/files/roblox-svg-free_GM431946152.pdf
    • https://razredna-nastava.net/files/coin-master-game-free-download_GM406889139.pdf
    • https://razredna-nastava.net/files/robux-com-free-robux_GM431946152.pdf
    • http://razredna-nastava.net/files/free-shirt-roblox_GM431946152.pdf
    • http://razredna-nastava.net/files/free-spin-card-exchange-coin-master_GM406889139.pdf
    • http://razredna-nastava.net/files/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://razredna-nastava.net/files/coin-master-heaven_GM406889139.pdf
    • http://razredna-nastava.net/files/coin-master-spin-hack-apk_GM406889139.pdf
    • https://razredna-nastava.net/files/free-coin-master-spins-for-today_GM406889139.pdf
    • https://razredna-nastava.net/files/coin-master-game-free-download-for-pc_GM406889139.pdf
    • https://razredna-nastava.net/files/how-to-get-free-robux-app_GM431946152.pdf
    • http://razredna-nastava.net/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://razredna-nastava.net/files/download-coin-master-hack-mod-apk_GM406889139.pdf
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://razredna-nastava.net/files/coin-master-free-spin-link-new_GM406889139.pdf
    • https://razredna-nastava.net/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://razredna-nastava.net/files/script-executor-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aea.bin
dcbb9d86e291bd15718dbf5dd8c5e6efe7608054a679482665b3a6f95258f0bf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEA 26292 bytes
font_01_sfnt_off00008555.bin
d23bbe04ef3196a5fa54f397c57d78b821aa47262b4b410e5e0dbd5db48197bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 17872 bytes

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