PDF malware analysis — malicious · 8dfa91a08b69a1c0

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 03:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3548a0fbb8fce3a54b8d6f56f7bc1eba SHA-1: 8d3e552b9a1df3a93090f07268377da469d35b01 SHA-256: 8dfa91a08b69a1c0b6c0c057725e25fd3b6b88b35352d2e9e2eb2406722b51a1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA, a common lure to trick users into downloading further malicious content. The embedded URL points to a resource that likely serves a malicious payload. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for execution.

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.tw/app/431946152/cheat-engine-with-roblox-game-hack
- https://ezgolfer.com.tw/image/data/files/dont-take-damage-hack-roblox_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/how-to-play-roblox-for-free_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/master-coin-hack_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/sb-game-hacker-coin-master_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/roblox-arsenal-hack_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/cute-free-stuff-on-roblox_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/coin-master-free-coins-link-march-2021_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/pubg-uc-new-freepik_GM1330123889.pdf
- https://ezgolfer.com.tw/image/data/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
- https://ezgolfer.com.tw/image/data/files/roblox-hack-tool-download-2021-pc_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/roblox-help-free-robux_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/monttechscom-coin-master-free-spins_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/real-robux-generator_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/rblx-gg-free-robux_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/how-to-get-free-mods-in-minecraft_GM479516143.pdf
- https://ezgolfer.com.tw/image/data/files/free-rare-cards-for-coin-master_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/free-robux-codes_GM431946152.pdf
- https://ezgolfer.com.tw/image/data/files/hack-game-coin-master_GM406889139.pdf
- https://ezgolfer.com.tw/image/data/files/free-robux-script_GM431946152.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_off0000526a.bin` `692cb9ead690e141961715109ea51678ce55a16dc93b229c06a983b35d9cea51`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x526A	25368 bytes
`font_01_sfnt_off00008d3e.bin` `fcefb8c134586f9234b6efde4984be48e3ca217f03535859daf06b4f1f280f9c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D3E	18888 bytes

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