PDF malware analysis — malicious · eec8bb848bcf1b53

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 15:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 9150974cbb41f3c9688cc0ee43adf39f SHA-1: 843794294dcc00c20b4575d888e3b1629a8e2424 SHA-256: eec8bb848bcf1b53310c74c858e262a17b6c283cafd08c9473b6b03fbb0ff3ad

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a lure for "unlimited Robux" and displays a fake CAPTCHA to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.xyz/app/431946152/how-to-get-unlimited-robux-2021-game-hack, likely leads to a payload download or further phishing attempt. The ML classifier strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/how-to-get-unlimited-robux-2021-game-hack
- http://ratchadatitan.com/UserFiles/File/can-you-play-minecraft-for-free_GM479516143.pdf
- http://ratchadatitan.com/UserFiles/File/free-minecraft-videos_GM479516143.pdf
- http://ratchadatitan.com/UserFiles/File/free-robux-gift-card-codes_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/free-robux-hack-2021_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/coin-master-free-spins-iphone-2021_GM406889139.pdf
- http://ratchadatitan.com/UserFiles/File/how-to-make-a-group-on-roblox-for-free_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/robux-hack-me_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-for-free_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/free-robux-discord_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/get-free-spins-coin-master-2021_GM406889139.pdf
- http://ratchadatitan.com/UserFiles/File/win-free-robux_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/how-to-get-free-things-on-roblox_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/coin-master-34-4-free-download_GM406889139.pdf
- http://ratchadatitan.com/UserFiles/File/ways-to-get-free-robux_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/robuxglobalcom_GM431946152.pdf
- http://ratchadatitan.com/UserFiles/File/pubg-uc-carding-telegram_GM1330123889.pdf
- http://ratchadatitan.com/UserFiles/File/coin-master-apk-mod-free-download_GM406889139.pdf
- https://Buy.HoaxMC.com
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004d65.bin` `d867ea07890bbe0b22aeef48ba780e86755ffa629d0c18161be42414b24dac58`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D65	26944 bytes
`font_01_sfnt_off00008ac8.bin` `1d788979998456612fc8aa94ab3a8f98716d71a7de86621e0b208fb5420da083`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AC8	19336 bytes

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