PDF malware analysis — malicious · b85eba57067da8dd

MALICIOUS

PDF

54.5 KB Created: 2021-06-09 13:31:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 98477f37388573662e8e1419e0d90189 SHA-1: 792aa71216f843899f27783d0b9fcd0c75a72c7e SHA-256: b85eba57067da8dd354832442c94669f4ee63b1eed803e8af70973b5a6014b74

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA and a visual download button, aiming to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.tw/app/431946152/roblox-jailbreak-hack-no-download-game-hack, is presented as a lure for a 'Roblox Jailbreak Hack'. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9471

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.tw/app/431946152/roblox-jailbreak-hack-no-download-game-hack
- https://www.wco.org.uk/uploads/files/files/how-to-get-minecraft-java-for-free_GM479516143.pdf
- https://www.wco.org.uk/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-2912-2021_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/robux-free-online_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/free-roblox-passwords_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/free-roblox-gameicon_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/hackear-coin-master-sin-verificacion_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/coin-master-download_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/wurst-download_GM479516143.pdf
- https://www.wco.org.uk/uploads/files/files/coin-master-daily-spin-free_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/free-roblox-clothes-and-hair_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
- https://www.wco.org.uk/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/robuxy-com-free-robux_GM431946152.pdf
- https://www.wco.org.uk/uploads/files/files/free-games-like-minecraft_GM479516143.pdf
- https://www.wco.org.uk/uploads/files/files/moonactive-free-spins-2021_GM406889139.pdf
- https://www.wco.org.uk/uploads/files/files/minecraft-windows-10-hacks_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000526c.bin` `4a5aa7c1d418c531d54bfe3d6dd9d57fa3a5c6db6a7bbaacd4f54728481da3bd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x526C	29676 bytes
`font_01_sfnt_off00009657.bin` `8d5a3a3f74e996f13e686791f48ffa53797833d16715f14eb14e042c476218c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9657	3652 bytes
`font_02_sfnt_off0000a304.bin` `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA304	5696 bytes
`font_03_sfnt_off0000b016.bin` `48ac083e83a5b37a6589f5010ad628d8dd0a41b9bcc871763d0e606a93ae29e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB016	18972 bytes

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