Malicious PDF — malware analysis report

Static analysis result for SHA-256 9520ce73844bc8a3…

MALICIOUS

PDF

35.9 KB Created: 2021-06-19 20:59:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 923beb151544b2022f9b38c16a82123d SHA-1: 4136fe35f687eaa5b0d51435c56f857cd2095d16 SHA-256: 9520ce73844bc8a3b655b5de70b7f57d113f71af06b017b3175fcecfe00f71fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

The document presents itself as a game hack, likely to trick users into downloading a malicious payload from the embedded URL. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to paste commands into a shell, suggesting an attempt to execute arbitrary code. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-jailbreak-speed-hack-new-code-game-hack
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/100-free-spins-for-coin-master_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-roblox-injecter-v3rmillipn_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-generator_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/get-free-obc-in-roblox-2021_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/real-minecraft-for-free_GM479516143.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/daily-coin-master_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-coin-master-spins_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spin-redeem-code_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-classic-free_GM479516143.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-spins-on-coin-master_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/hack-coin-master-online_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/new-hack-roblox-2021-rbx_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/create-minecraft-server-free_GM479516143.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/moonactive-coin-master-hack_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-free-download-apk-softonic_GM479516143.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-obby_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-launcher-download-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033fe.bin
435b8792f718439ad6d49d40f0bd2d7b718e4ddaa06642c6e54774fd0c391362
pdf-font-stream PDF embedded font (sfnt) at offset 0x33FE 22468 bytes
font_01_sfnt_off000065f9.bin
3049b277c056a3d8fad20f169be90e917c6b39e819c2ffe524cdfe7ff53bf8ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 19456 bytes