PDF malware analysis — malicious · b759ce3e08037401

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 04:09:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 534eb740fc797a961780ffb99f677697 SHA-1: 397e7615f0d2cfd83d0b839a6381065e3eea78a4 SHA-256: b759ce3e0803740194d09080ea4cc08cbabfefd77cec97511d2b4c324ccd0894

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link, likely to download a second-stage payload or lead them to a scam website. The embedded URLs point to domains associated with free Robux and Coin Master hacks, indicating a lure-based social engineering attack. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/make-free-robux-game-hack
- https://weddingcards-expert.tw/upload/files/blogspot-coin-master_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spins-promo-code_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/was-minecraft-ever-free_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/how-to-hack-to-get-robux_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/legit-free-spins-coin-master_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-hack-version-2021-download_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/how-to-hack-robux_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-apk-hack-32_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/minecraft-hacked-client-18_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spins-1701-20_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/how-to-get-java-minecraft-free_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/free-roblox-clothes-boy_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/wahoo-gaming-co-free-robux_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/free-minecraft-client_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/minecraft-menu_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/roblox-free-robux-codes_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/roblox-robux-generator_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_off000049a9.bin` `9008e889d7bd98c54901bde6bf68d0d7aacb7a0c9aaec44a2fea720b2b4e4d64`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49A9	25232 bytes
`font_01_sfnt_off00008449.bin` `ffc801fe6c311414aab45f29f725ac19f85306497fb99419c1a1229f9950fbca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8449	18608 bytes

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