PDF malware analysis — malicious · 1a5a1d9c38fd0b95

MALICIOUS

PDF

47.0 KB Created: 2021-06-11 05:14:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 33092cc42c9c0523e90c3a2e3e61800a SHA-1: b4e87087c8dd638c7779044d1faf5d9f52256255 SHA-256: 1a5a1d9c38fd0b95908dcba0dad2b4269efcadf97746b6504518f7d2b6b76b40

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, aiming to trick users into downloading a file from the provided URL. The document's content and associated URLs suggest a lure related to game cheats or in-game currency, likely leading to a second-stage payload. No scripts were extracted, but the presence of external URLs and the fake CAPTCHA heuristic strongly indicate a malicious intent to deliver further malware.

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 https://netcdn.tw/app/431946152/roblox-cheat-engine-money-hack-game-hack
- https://www.shin.ge/images/roblox-executor-free_GM431946152.pdf
- https://www.shin.ge/images/apps-that-give-you-free-robux_GM431946152.pdf
- https://www.shin.ge/images/free-robux-not-fake_GM431946152.pdf
- https://www.shin.ge/images/how-do-you-get-robux-free-glitch-2021_GM431946152.pdf
- https://www.shin.ge/images/free-shirts-that-look-pretty-on-roblox_GM431946152.pdf
- https://www.shin.ge/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
- https://www.shin.ge/images/spin-and-coin_GM406889139.pdf
- https://www.shin.ge/images/minecraft-server-free-trial_GM479516143.pdf
- https://www.shin.ge/images/free-promo-code-for-2-million-robux_GM431946152.pdf
- https://www.shin.ge/images/roblox-hacked-twitter_GM431946152.pdf
- https://www.shin.ge/images/free-robux-gift-cards-2021_GM431946152.pdf
- https://www.shin.ge/images/nbc-roblox-hack_GM431946152.pdf
- https://www.shin.ge/images/roblox-ro-ghoul-hack-rc_GM431946152.pdf
- https://www.shin.ge/images/free-robux-without-human-verification-on-ipad_GM431946152.pdf
- https://www.shin.ge/images/hacks-to-get-free-robux_GM431946152.pdf
- https://www.shin.ge/images/minecraft-name-tag-hacks_GM479516143.pdf
- https://www.shin.ge/images/promo-codes-to-get-free-robux_GM431946152.pdf
- https://www.shin.ge/images/pokemon-go-five-free-raid-passes_GM1094591345.pdf
- https://www.shin.ge/images/free-roblox-toy-codes-2021_GM431946152.pdf
- https://www.shin.ge/images/coin-master-gold-cards-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
`stream_004_off00005076.bin` `4d2aa3e0076241ce25c08ec502c4f89f50c897cdca0572db147670ff93c2cae2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5076	30156 bytes
`font_01_sfnt_off000092a2.bin` `14711cfcba80543e7c49a5c811b8c315220c5b6c6caab716cb501698ae306f00`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92A2	19236 bytes

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