Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5162c77be835e4…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 17:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 10473f6dceac4a35151466759fb230c8 SHA-1: ac69f2c3a3c628f45710f523cc2a2713fd5c3cc3 SHA-256: 8b5162c77be835e49e9aa6dc34b82ad735765929c98cab8611b2f94a9657fa01
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains lures for free Robux and game cheats, directing users to external URLs for downloads. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may instruct users to paste content into a command-line interface, suggesting a potential payload execution. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/free-robux-websites-that-work-game-hack
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-game-packs-for-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/huskybuckscom-free-robux_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-apk-mod_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/regal-world-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-website_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/como-hackear-coin-master-iphone_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/sites-to-get-free-robux_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-robux-without-human-verification_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-firebird-card-free_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/mcpe-116_GM479516143.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-stuff-on-roblox_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-easy_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/www-robux-com_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/can-lucky-patcher-hack-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/facebook-coin-master-free-spins-link_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-microsoft_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b92.bin
4694ca515124f5ec84a3cff18746983b49ecd229a3f8d8c33fa759a150e1ee34		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B92 24452 bytes
font_01_sfnt_off00008220.bin
7385cf8e30761df55e83d9792ae8d47179260988159899b0069d718a962ca50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8220 19000 bytes

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