PDF malware analysis — malicious · ca9caac0d79d2229

MALICIOUS

PDF

43.3 KB Created: 2021-05-14 22:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b143e7078a9b1ccf097fe1ec47df9058 SHA-1: 0996efaff9ad66d390ceb14a2bbdffeb434a4eb5 SHA-256: ca9caac0d79d22294ef87c9073736a0b858a55694565e97ad44d3eb27faba980

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by an ML classifier as malicious and contains a fake CAPTCHA lure to trick users into downloading further content. It also embeds external URIs pointing to potentially malicious files, such as 'https://netcdn.xyz/app/431946152/robuxmatch.con-game-hack'. The document's purpose appears to be distributing malware disguised as game-related downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/robuxmatch.con-game-hack
- https://key8013805.com.tw/upload/files/free-minecraft-account-and-password-generator_GM479516143.pdf
- https://key8013805.com.tw/upload/files/optifine-minecraft-pe_GM479516143.pdf
- https://key8013805.com.tw/upload/files/free-robux-without-verify_GM431946152.pdf
- https://key8013805.com.tw/upload/files/robux-codes_GM431946152.pdf
- https://key8013805.com.tw/upload/files/free-spins-on-coin-master-game_GM406889139.pdf
- https://key8013805.com.tw/upload/files/free-face-roblox_GM431946152.pdf
- https://key8013805.com.tw/upload/files/free-coin-master-spins-link-facebook_GM406889139.pdf
- https://key8013805.com.tw/upload/files/huskybuckscom-free-robux_GM431946152.pdf
- https://key8013805.com.tw/upload/files/how-to-hack-someones-roblox-account_GM431946152.pdf
- https://key8013805.com.tw/upload/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
- https://key8013805.com.tw/upload/files/coin-master-cards_GM406889139.pdf
- https://key8013805.com.tw/upload/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdf
- https://key8013805.com.tw/upload/files/roblox-free-robux-website_GM431946152.pdf
- https://key8013805.com.tw/upload/files/coin-master-free-spin-and-coin_GM406889139.pdf
- https://key8013805.com.tw/upload/files/coin-master-free-spins-2021-hack_GM406889139.pdf
- https://key8013805.com.tw/upload/files/i-got-hacked-on-roblox_GM431946152.pdf
- https://key8013805.com.tw/upload/files/open-coin-master_GM406889139.pdf
- https://key8013805.com.tw/upload/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
- https://key8013805.com.tw/upload/files/how-do-u-hack-roblox_GM431946152.pdf
- https://key8013805.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000048f8.bin` `de70256bd5fc02ea7d6c9804c3dc1d6d7870d1448e10791c1d80538651acb59b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48F8	26900 bytes
`font_01_sfnt_off000085ec.bin` `b3ad435d94df059fa4f5f4039152be4ff635e0c8c599297d8dd6c4123da1a60e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85EC	18672 bytes

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