PDF malware analysis — malicious · fb683c4961d96138

MALICIOUS

PDF

33.3 KB Created: 2021-06-27 22:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: bbe1c7b4b79b51ce6356f9986a8eb9c2 SHA-1: 6b0ef18690a616959ac7b752dc367ce6c63c9554 SHA-256: fb683c4961d961387452afb362c84ab5e924fb180056eb17c46f8cc223c551e9

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.001 PowerShell

The document presents a lure for free Robux, containing multiple embedded URLs pointing to potentially malicious content. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a shell, likely to execute a downloaded payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-robux-real-no-fake-game-hack
- https://mtsn31jkt.com/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/rbx-place-free-robux_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-spins-free_GM406889139.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/best-hacked-client_GM479516143.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/heroes-online-hack-2021-roblox_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/rxgate-cf-free-robux_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-realistic-minecraft-texture-packs_GM479516143.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-into-roblox-accounts-2021_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-pics_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-codes-pastebin_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-blogspot_GM406889139.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-please_GM431946152.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdf
- https://mtsn31jkt.com/__statics/gudangsoal/files/snapse-hack-roblox-2021-anti-ban_GM431946152.pdf
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-make-robux_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00002e72.bin` `3c1ace5152de0cff7983f62c2d8f48f7e79430c721da5c1b00272c00429c86ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E72	21380 bytes
`font_01_sfnt_off00005d25.bin` `06acd08852ac08c01837d2c926532627cbded6616b6b55be5d05fd3489a30682`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D25	18960 bytes

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