PDF malware analysis — malicious · fc72a56b94acd6ac

MALICIOUS

PDF

46.7 KB Created: 2021-05-14 22:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: f2f2d83dd863a39b18d2012cd3768717 SHA-1: 0732076923146677ac79b441017038ba6d5ab3e4 SHA-256: fc72a56b94acd6ac73ada6d6cf26da7c8eeb6525e8a8e2397d65b7eb7055f5dd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-pin-codes-game-hack, likely leads to a secondary download or exploit. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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-pin-codes-game-hack
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/hack-avatar_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-robux-without-human-verification_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-generator_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-shirts-templates_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/minecraft-pe_GM479516143.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-spin-cheat_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/pro-free-spins-coin-master_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/https-rbx-place-rewards_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdf
- https://zarco.co.in/uploaded_files/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004d28.bin` `af5eb30d3cb79d30797bb2c1f9d3bec4a64a2d17408b30ee51db156742997531`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D28	26272 bytes
`font_01_sfnt_off00008a02.bin` `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A02	2840 bytes
`font_02_sfnt_off000093b4.bin` `23872266a6577b01853888d52c04c526ac323517b7f86f8cb64f3b9e81653507`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93B4	18464 bytes

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