PDF malware analysis — malicious · 34dbaa19408c831a

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 05:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: a34ae7ae071739e1e7023ac65ca1d387 SHA-1: 9f7ba2bfe2e3971808115cd6952ce3e6a2382029 SHA-256: 34dbaa19408c831a7ed9a7a07b8222b4739c1b5d26dc7159bc746f4b8810d09a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The document displays a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The embedded URL, https://netcdn.xyz/app/431946152/robux-online-game-hack, is a strong indicator of a malicious download attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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/431946152/robux-online-game-hack
- https://leechan.cn/Public/upload/editorfiles/hack-game-coin-master_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/robloxmatchcom-free-robux_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/blox-pink-robux-free_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/free-spin-links-coin-master-2021_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/rbx-gg-free-robux_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/coin-master-34-4-free-download_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/robux-robux_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/25-free-spins-coin-master_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/how-to-get-free-robux-on-roblox_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/free-spin-coin-master-2021-link_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/coin-master-links-free-spins_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/coin-master-hack-without-verification_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/free-robux-com-roblox_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/coin-master-free-foxy-food_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/coin-master-free-coins-and-spins-2021_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/free-coins-coin-master-2021_GM406889139.pdf
- https://leechan.cn/Public/upload/editorfiles/free-premium-roblox_GM431946152.pdf
- https://leechan.cn/Public/upload/editorfiles/free-coin-master-coins-and-spins_GM406889139.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_off00004921.bin` `6d43b101de28acd5323d7613f0cf3820a4854c6cf6cb63c9837ddca79102987f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4921	25992 bytes
`font_01_sfnt_off00008611.bin` `889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8611	2984 bytes
`font_02_sfnt_off0000903d.bin` `613688d39500d5b16bf64409f0aca6fe840d07506161475672c290022fb5aac0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x903D	18044 bytes

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