PDF malware analysis — malicious · 398a133797dff7ad

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 17:32:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: f565c435abd67848452e14bc9dea0b70 SHA-1: e55ea457a0d5c11a3a15a818237894667d329b15 SHA-256: 398a133797dff7adccd18d8ff4262a86817150a844edb97a29b8b889898c7fe0

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, identified as a link farm, pointing to various game-related cheat and hack sites. The primary URL, http://netcdn.tw/app/406889139/free-spin-link-coin-master-game-hack, is likely a distribution point for malicious content. The ML classifier strongly indicates maliciousness, and the presence of a "download button" lure reinforces the intent to trick users into downloading potentially harmful files.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.tw/app/406889139/free-spin-link-coin-master-game-hack
- https://berkahjayamulia.com/ckfinder/userfiles/files/sword-fighting-tournament-roblox-cheats_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/hack-xp-net-coin-master_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/beautiful-roblox-shirt-template-download-free_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/free-hair-roblox-not-moel_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/daily-spin-coin-master-free_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/minecraft-free-play-no-download_GM479516143.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/add-robux_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/dbor-roblox-level-hack-v3rmillion_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/tiktok-free-views_GM835599320.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-apk-mod-hack-download_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/free-robux-obby-no-password-2021-link_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/free-robux-deutsch_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/how-do-i-get-free-robux_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/5-games-that-give-out-free-robux_GM431946152.pdf
- https://berkahjayamulia.com/ckfinder/userfiles/files/real-robux-codes_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_002_off000033b5.bin` `7b595e75e73100dac2fb7caa42249d57496f2d1a4221fcce0435d814b3313132`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33B5	23360 bytes
`font_01_sfnt_off00006898.bin` `05274da8f0b2c24f990b03f912799dd404877cbb0fa71ac5363d7c288192e7fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6898	18344 bytes

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