Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66318932409c8d1…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 03:10:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c17ad12269f8eaee39cb1b794152736e SHA-1: 0b3ec039e0667b8a7f78e3e3de24d1b6e865abcf SHA-256: d66318932409c8d16c955d626dc68c02800f5d52e9ad3fa89715b041236d6948
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux, a virtual currency, and explicitly instructs the user to paste content into a command-line interface, indicating an attempt to trick the user into executing commands. The embedded URL points to a domain associated with malicious activity, likely serving as a download or redirection point for a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/promotion-code-for-free-robux-game-hack
    • http://lib.fekon.untad.ac.id/repository/minecraft-pc-free_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/reddit-coin-master-free-spins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/wyas-of-getting-robux-for-free_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-roblox-for-robux-on-phone_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-use-cheat-engine-on-roblox-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/give-me-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/tik-tok-free-fire-30-detik_GM835599320.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-daily-spin-coin-master-game_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-free-download_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-verify_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-java-free-download_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/picture-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005056.bin
0484e8e896c11adc567df1860d6d3bec80e68efa613a412a8285d7cc821d7388		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5056 27236 bytes
font_01_sfnt_off00008ea9.bin
1fb4f998a49f02bfb561b166ed14b25612dbc878c32a4b9d362f224630e006dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA9 18828 bytes

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