PDF malware analysis — malicious · 4084f86bae1ebbff

MALICIOUS

PDF

44.9 KB Created: 2021-05-16 11:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 6185a2161c6047b453085173e367a437 SHA-1: 7c7a65a22ca3e3cf3aaf67cfac050eb448e51eff SHA-256: 4084f86bae1ebbff997763a6c1a344be5de4655c2d36e42af7d91c24646e4cd9

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download or exploit. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/freespinandcoin-blogspot-coin-master-game-hack', suggest a lure related to game hacks or cheats, a common social engineering tactic. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious intent to redirect the user to external resources that likely host further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/freespinandcoin-blogspot-coin-master-game-hack
- http://schrichte.de/images/coin-master-coin-link_GM406889139.pdf
- http://schrichte.de/images/coin-master-pro-hack_GM406889139.pdf
- http://schrichte.de/images/free-robux-hack-2021_GM431946152.pdf
- http://schrichte.de/images/coin-master-mod-version-free-download-2021_GM406889139.pdf
- http://schrichte.de/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
- http://schrichte.de/images/coin-master-cards-free-cards_GM406889139.pdf
- http://schrichte.de/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
- http://schrichte.de/images/how-to-get-robux-for-free-2021_GM431946152.pdf
- http://schrichte.de/images/coinmaster-hack_GM406889139.pdf
- http://schrichte.de/images/coin-master-cheats-2021_GM406889139.pdf
- http://schrichte.de/images/roblox-login-hack_GM431946152.pdf
- http://schrichte.de/images/coin-master-hack-spin-160-pro_GM406889139.pdf
- http://schrichte.de/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
- http://schrichte.de/images/no-human-verification_GM431946152.pdf
- http://schrichte.de/images/how-to-hack-and-get-free-robux_GM431946152.pdf
- http://schrichte.de/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
- http://schrichte.de/images/free-robux-generator-no-survey_GM431946152.pdf
- http://schrichte.de/images/robux-app_GM431946152.pdf
- http://schrichte.de/images/coin-master-free-coins-link_GM406889139.pdf
- http://schrichte.de/images/free-account-roblox-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
`font_00_sfnt_off000048a8.bin` `e3b8d108ad8a1c2ae1e0db1155385c90b610645f21c62c86d8cbbfdc6e306176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48A8	24768 bytes
`font_01_sfnt_off000081eb.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81EB	2880 bytes
`font_02_sfnt_off00008bd6.bin` `2931d6284dbf135659b140410c03fb6a10ec8e1a87db333076a10ec3316c1554`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BD6	18636 bytes

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