PDF malware analysis — malicious · 119d19cbf8a2d1fe

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 04:57:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 0530f1188673babbc356954914786eec SHA-1: 9cf8f4cf0a98440045bbc5ca9631a819e2fe0d44 SHA-256: 119d19cbf8a2d1fe3fe5a5fecc5d0c83ed47fb2a5e587fb24d9d845ca9041d3b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA lure to deceive the user into interacting with it, likely to download a malicious payload. The embedded URL points to a resource that is likely malicious, and the ML classifier strongly indicates maliciousness. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interaction for payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-hack-site-game-hack
- https://lib.btkljogja.or.id/repository/roblox-account-hacker-tool_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/minecraft-hacks-18-9_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/regal-world-coin-master_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/coin-master-heaven-free-spins_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/collect-robux_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/roblox-hacks-com_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/minecraft-server-free-trial_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/minecraft-beta-free_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/bloxpink-free-robux_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/minecraft-free-download_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/coin-master-free-spins-2021_GM406889139.pdf
- https://lib.btkljogja.or.id/repository/minecraft-free-download-chromebook_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/robux-robux_GM431946152.pdf
- https://lib.btkljogja.or.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdf
- https://lib.btkljogja.or.id/repository/minecraft-download-free-download_GM479516143.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_off00004f09.bin` `8f6d6622f1468644af81a027355b3069c0d9cbd0be9987c1218bee52648d0689`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F09	26020 bytes
`font_01_sfnt_off00008b06.bin` `baa68e8b80fe17984eb0f5893287011db8c451c65a8bba41303beeb2aadfa952`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B06	18408 bytes

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