PDF malware analysis — malicious · 50d682f5f72c93de

MALICIOUS

PDF

50.0 KB Created: 2021-06-02 12:55:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: e48d40022137d0541a86b7264fb8c46d SHA-1: e2caa8538803f32ef909dc50836de65cafed16cd SHA-256: 50d682f5f72c93de87290ef352b018090a68f509348cf813850e1d14bd998a43

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds external URIs, such as 'https://netcdn.xyz/app/431946152/free-shoulder-accessories-roblox-game-hack', which likely lead to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9871

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-shoulder-accessories-roblox-game-hack
- https://gryps.de/images/get-free-robux-no-verification_GM431946152.pdf
- https://gryps.de/images/best-free-minecraft-skins_GM479516143.pdf
- https://gryps.de/images/how-to-get-robux-for-free-2021_GM431946152.pdf
- https://gryps.de/images/free-robux_GM431946152.pdf
- https://gryps.de/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
- https://gryps.de/images/earn-free-robux-for-roblox_GM431946152.pdf
- https://gryps.de/images/coin-master-hack-tool-2021_GM406889139.pdf
- https://gryps.de/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
- https://gryps.de/images/minecraft-client_GM479516143.pdf
- https://gryps.de/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
- https://gryps.de/images/how-to-get-free-spins-for-coin-master_GM406889139.pdf
- https://gryps.de/images/coin-master-hack-tips_GM406889139.pdf
- https://gryps.de/images/como-hackear-coin-master-iphone_GM406889139.pdf
- https://gryps.de/images/free-spins-for-coin-master-2021_GM406889139.pdf
- https://gryps.de/images/games-like-coin-master-for-free_GM406889139.pdf
- https://gryps.de/images/how-to-get-minecraft-realms-for-free_GM479516143.pdf
- https://gryps.de/images/minecraft-pe-free-apk_GM479516143.pdf
- https://gryps.de/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
- https://gryps.de/images/try-minecraft-free_GM479516143.pdf
- https://gryps.de/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000519c.bin` `7dbc4ccad327d92998e1233e84089eca23d231ee6a86d8fa8edf2bc04df3f2d0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x519C	35456 bytes
`font_01_sfnt_off0000a0ec.bin` `a1bcd8016a9d6bf07dc7de965c45d39386756d949521f567ce8757abe7706e70`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0EC	18548 bytes

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