PDF malware analysis — malicious · 37439127c391b662

MALICIOUS

PDF

40.4 KB Created: 2021-05-17 22:19:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 469d2b3ec1751cd0b7f9d85503153c90 SHA-1: 752816b29bf2925a4d16cdebb49c076cb70972a3 SHA-256: 37439127c391b662d5589efcbedc295baf250f72a3c063c6afcb12c044d441a0

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA or human verification prompt, a common lure to trick users into interacting with malicious content. It contains an embedded URI pointing to a URL associated with free Robux and game hacks, suggesting the document's purpose is to redirect users to a potentially malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/how-to-earn-free-robux-game-hack
- https://www.metal.hr/files/coin-master-free-spins-daily-2021_GM406889139.pdf
- https://www.metal.hr/files/coin-master-hack-apk-free-download_GM406889139.pdf
- https://www.metal.hr/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
- https://www.metal.hr/files/roblox-c9m_GM431946152.pdf
- https://www.metal.hr/files/coin-master-free-cards_GM406889139.pdf
- https://www.metal.hr/files/how-to-get-more-robux-for-free_GM431946152.pdf
- https://www.metal.hr/files/free-vip-roblox_GM431946152.pdf
- https://www.metal.hr/files/roblox-promo-codes-2021-robux_GM431946152.pdf
- https://www.metal.hr/files/roblox-royale-high-diamond-hack_GM431946152.pdf
- https://www.metal.hr/files/flip-master-free-coins_GM406889139.pdf
- https://www.metal.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdf
- https://www.metal.hr/files/hacked-roblox-game_GM431946152.pdf
- https://www.metal.hr/files/how-to-get-more-spins-on-coin-master_GM406889139.pdf
- https://www.metal.hr/files/coin-master-hack-2021-apk_GM406889139.pdf
- https://www.metal.hr/files/roblox-piano-hack_GM431946152.pdf
- https://www.metal.hr/files/free-robux-generator-without-verification_GM431946152.pdf
- https://www.metal.hr/files/roblox-hack-generator_GM431946152.pdf
- https://www.metal.hr/files/robux-fun-hack_GM431946152.pdf
- https://www.metal.hr/files/80-free-spins-coin-master_GM406889139.pdf
- https://www.metal.hr/files/how-to-get-roblox-premium-for-free_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_off00004544.bin` `42d5b0648a5ae6e467983d13b54816aebf40cceb5eccd020c0011efff5eb796f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4544	23684 bytes
`font_01_sfnt_off00007af8.bin` `14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AF8	18404 bytes

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