PDF malware analysis — malicious · e473cc897387c23e

MALICIOUS

PDF

46.6 KB Created: 2021-05-16 11:47:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: f0ef7a80f216afb7779085be037bead8 SHA-1: e7da258ea74f88561110678d52195c81c3970c78 SHA-256: e473cc897387c23e58abb4a0e40725a873e56db782bb5bb359cf53d2e4724795

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URIs pointing to potentially malicious content, such as 'https://netcdn.xyz/app/431946152/blox-fun-info-game-hack'. The presence of these elements suggests the document is intended to facilitate the download and execution of a second-stage payload, likely exploiting client execution vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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/blox-fun-info-game-hack
- http://yochin.org.tw/images/to-get-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/hack-coin-master-spin-android_GM406889139.pdf
- http://yochin.org.tw/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-generator-no-human-verification_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-scam_GM431946152.pdf
- http://yochin.org.tw/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
- http://yochin.org.tw/images/free-2021-robux_GM431946152.pdf
- http://yochin.org.tw/images/free-daily-spins-coin-master-2021_GM406889139.pdf
- http://yochin.org.tw/images/claimrbx-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/daily-free-spins-coin-master-app_GM406889139.pdf
- http://yochin.org.tw/images/free-spin-online-tool-coin-master_GM406889139.pdf
- http://yochin.org.tw/images/minecraft-free-minecraft_GM479516143.pdf
- http://yochin.org.tw/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
- http://yochin.org.tw/images/bloxpink-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
- http://yochin.org.tw/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
- http://yochin.org.tw/images/free-robux-pins_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-no-download_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-co_GM431946152.pdf
- http://yochin.org.tw/images/coin-master-free-spins-cheat_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_off00004c26.bin` `cad962d115f645aafe2a43fdc94601425dfcdce21b5a370622f49cd84c901510`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C26	27744 bytes
`font_01_sfnt_off00008b02.bin` `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B02	2832 bytes
`font_02_sfnt_off000094b3.bin` `378f68af7bda96ca08821290e5d02393c78bb3c0fb942949d143c89702000491`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94B3	17928 bytes

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