PDF malware analysis — malicious · abb223dbbf67ac6b

MALICIOUS

PDF

44.9 KB Created: 2021-06-13 17:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 7f3be97f2903f699e061b9734e81b4f0 SHA-1: 30c8e7f108fba765af8b3938d1baf215562148cf SHA-256: abb223dbbf67ac6ba35c4c73d555b75cf066ae358f687eb74b06c39e35eef1cc

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource that claims to offer free Robux, a common lure for gaming-related scams. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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/how-to-get-robux-for-free-no-generator-game-hack
- https://cosmosocean.com.tw/upload/files/minecraft-building-hacks_GM479516143.pdf
- https://cosmosocean.com.tw/upload/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/master-coin-free_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/free-coin-coin-master_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/roblox-hack-tools-no-virus_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/freerobuxhack-us-2021_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/how-to-hack-peoples-accounts-on-roblox-2021_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/rbxfree-com-free-robux_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/hack-coin-master-343-apk_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/apps-for-free-robux_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/how-to-get-free-premium-roblox_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
- https://cosmosocean.com.tw/upload/files/www-cheatsk-com-coin-master-hack_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
- https://cosmosocean.com.tw/upload/files/free-roblox-gfx_GM431946152.pdf
- https://cosmosocean.com.tw/upload/files/coin-master-rare-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_off00005243.bin` `a7e8f1373caae3efe07d4c7190f9daeb8c926846d0ffe04ac4b9151ee2d47629`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5243	24900 bytes
`font_01_sfnt_off00008bf5.bin` `819779faf47f7ed6b433d68060d7e4899b71acd701436624467b3e44ec8068db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BF5	18512 bytes

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