PDF malware analysis — malicious · dab1aab163b748db

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 15:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: bf3a032e8bfc73933cdc4e9e2bfb05d1 SHA-1: e4157b6d4093c2b45bd5dad96d491b38a7087495 SHA-256: dab1aab163b748dbf0458757bba3a62c9502320dbc2a4a10a2054a42a4ea5285

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds external URIs, including one pointing to a suspicious URL, which likely serves as a download source for a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

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/406889139/free-spins-and-coins-coin-master-game-hack
- http://www.fluidtech.hu/images/how-to-free-robux_GM431946152.pdf
- http://www.fluidtech.hu/images/free-roblox-clothes_GM431946152.pdf
- http://www.fluidtech.hu/images/coin-master-hack-with-lucky-patcher_GM406889139.pdf
- http://www.fluidtech.hu/images/coin-master-hack-spins-free_GM406889139.pdf
- http://www.fluidtech.hu/images/hacker-coin-master_GM406889139.pdf
- http://www.fluidtech.hu/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
- http://www.fluidtech.hu/images/free-unlimited-coins-for-coin-master_GM406889139.pdf
- http://www.fluidtech.hu/images/how-to-get-2021-robux-for-free_GM431946152.pdf
- http://www.fluidtech.hu/images/free-robux-games-on-roblox_GM431946152.pdf
- http://www.fluidtech.hu/images/demon-roblox_GM431946152.pdf
- http://www.fluidtech.hu/images/how-to-become-a-hacker-in-roblox_GM431946152.pdf
- http://www.fluidtech.hu/images/master-coin-free_GM406889139.pdf
- http://www.fluidtech.hu/images/coin-master-cards-hack_GM406889139.pdf
- http://www.fluidtech.hu/images/how-to-get-roblox-credit-for-free_GM431946152.pdf
- http://www.fluidtech.hu/images/how-to-hack-coin-master-2021_GM406889139.pdf
- http://www.fluidtech.hu/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
- http://www.fluidtech.hu/images/free-spin-and-coin-links_GM406889139.pdf
- http://www.fluidtech.hu/images/coin-master-hack-without-verification-ios_GM406889139.pdf
- http://www.fluidtech.hu/images/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdf
- http://www.fluidtech.hu/images/how-to-get-free-robux-easy-2021_GM431946152.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_off00004935.bin` `274abc93f403234ecf1c922b9d2973087320037e10baf78cb9cf52337604a2ce`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4935	24204 bytes
`font_01_sfnt_off0000808d.bin` `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x808D	2840 bytes
`font_02_sfnt_off00008a3e.bin` `d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A3E	18060 bytes

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