Malicious PDF — malware analysis report

Static analysis result for SHA-256 b594dce4d5d574f9…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 06:29:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 378c4a81c592ff5a6c27fe55b4b54636 SHA-1: 782310fbc6ed46a6e7bf9223195fd3f237c50497 SHA-256: b594dce4d5d574f9e04bc054428e8f8cb0d2f39a35d62dd0a349e33bb9e005a6
82 Risk Score

Malware Insights

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

The PDF contains an embedded URL and a lure for downloading a game hack, which is a common social engineering tactic. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to execute commands, potentially by copying and pasting into a shell. The ML classifier strongly flags this PDF as malicious, suggesting it's designed to deliver a payload.

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/minecraft-windows-free-game-hack
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-minecraft-for-kids_GM479516143.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-hack-uk_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/minecraft-linux-free_GM479516143.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/minecraft-sign-up-free_GM479516143.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/roblox-game-free-download_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/download-coin-master-hack-apk_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/today-free-spin-coin-master_GM406889139.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c45.bin
8ee4cda943b8e278426a7de0e4be1751f9d81effc2561f3380be337df1796361		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C45 24984 bytes
font_01_sfnt_off00008564.bin
17ed61b8d418eb531f0e9f48c5430b9261b703312875c5060f44484e1085bb50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 18244 bytes

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