PDF malware analysis — malicious · 431e8d45cc93a7b3

MALICIOUS

PDF

46.6 KB Created: 2021-06-13 17:50:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 5c956b4418fe818b56e6d3df9281629f SHA-1: 5a9f0c36cca980a7799e0f879ffc0fdb8a538351 SHA-256: 431e8d45cc93a7b3c09f94e4f1d75e880fd7a0aebc8601764dab554b6b1a14ec

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA or human verification prompt, a common lure for users seeking cheats or free items. It contains embedded URLs pointing to sites offering 'free Robux' or 'Coin Master cheats', which are likely malicious. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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 http://netcdn.co/app/431946152/groups-on-roblox-that-give-you-free-robux-game-hack
- https://xiangquan.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-free-generator_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/free-spins-coin-master-cheat_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-hack-app_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/80-free-spins-coin-master_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdf
- https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-free-coins-2021_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/how-to-win-free-robux_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/windows-10-minecraft-hacks_GM479516143.pdf
- https://xiangquan.com.tw/image/data/files/minecraft-mac-free_GM479516143.pdf
- https://xiangquan.com.tw/image/data/files/robux-no-survey_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/free-robux-no-scam_GM431946152.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-heaven-free-spins-link_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
- https://xiangquan.com.tw/image/data/files/coin-master-gift-link-hack_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000053a7.bin` `0f6ff47968a19762bb2f42b856ae6e8ebecd734deaa236b38d33f08dd41f72c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53A7	26940 bytes
`font_01_sfnt_off000090fd.bin` `dd220fcde6eeb83dfa7370751555b85fac5db1d44f0e0c96748b288182cd9fbf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90FD	19156 bytes

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