PDF malware analysis — malicious · 76c1174823ff5b85

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 09:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3c19b89a73d18b17dd0009f6f3df7234 SHA-1: 5b97440979b3aae3d898cac0abd50fa75365fd14 SHA-256: 76c1174823ff5b853ea5835ad7f3b0a6e215a5b3fdea2df36cd07aeeba636970

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt, a common lure to trick users into downloading further malicious content. It contains an embedded URI pointing to a suspicious URL, likely intended to host a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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/406889139/coinmaster-blogspot-game-hack
- https://ifef.es/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/robux-rewards_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-rtx-download-free_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/robux-game_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/xray-hack_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-hack-cheat-engine_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/hack-coin-master-spin_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-inappropriate-games_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/master-free-spin_GM406889139.pdf
- https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.html
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005109.bin` `e00840b0e3ac91323c48e572d703212390b47e243ff35004254c912f14903e9d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5109	27284 bytes
`font_01_sfnt_off00008e4b.bin` `b6c1a4b4a396e514168379159069ddcbbdb2f4734aa5f4f24f50e1de42ff982a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E4B	18560 bytes

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