PDF malware analysis — malicious · 9709252a13693cc9

MALICIOUS

PDF

44.8 KB Created: 2021-05-18 04:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 6e998a15da18e746062a127f764e9996 SHA-1: d27347daa25e1b6b2521653038a4b4f034f00b73 SHA-256: 9709252a13693cc9396f226f0eee2dab9d286f609f2f407eb38abe37147390be

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to lure users with promises of free in-game currency and hacks. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to potentially malicious download sites via a deceptive lure.

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 https://netcdn.xyz/app/431946152/free-robux-2021-no-human-verification-game-hack
- https://alimi.com.tw/upload/files/free-spins-coin-master-2021-no-verification_GM406889139.pdf
- https://alimi.com.tw/upload/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
- https://alimi.com.tw/upload/files/mcpe-master-hack-coin-apk_GM406889139.pdf
- https://alimi.com.tw/upload/files/how-to-get-free-robux-without-paying_GM431946152.pdf
- https://alimi.com.tw/upload/files/coin-master-on-facebook_GM406889139.pdf
- https://alimi.com.tw/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdf
- https://alimi.com.tw/upload/files/free-robux-sites-that-work_GM431946152.pdf
- https://alimi.com.tw/upload/files/free-minecraft-windows-10-with-java_GM479516143.pdf
- https://alimi.com.tw/upload/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
- https://alimi.com.tw/upload/files/coin-master-free-spins-link-today-ios_GM406889139.pdf
- https://alimi.com.tw/upload/files/multiplayer-master-hack-coins_GM406889139.pdf
- https://alimi.com.tw/upload/files/free-coin-master-hacks_GM406889139.pdf
- https://alimi.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdf
- https://alimi.com.tw/upload/files/roblox-hacked-com-2021_GM431946152.pdf
- https://alimi.com.tw/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdf
- https://alimi.com.tw/upload/files/coin-master-free-spin-and-trading_GM406889139.pdf
- https://alimi.com.tw/upload/files/how-to-earn-robux_GM431946152.pdf
- https://alimi.com.tw/upload/files/minecraft-java-free_GM479516143.pdf
- https://alimi.com.tw/upload/files/withdraw-robux_GM431946152.pdf
- https://alimi.com.tw/upload/files/how-to-get-minecraft-java-for-free_GM479516143.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_off000049fd.bin` `e303bd6d66444e85e1e7203cedb06982faa0a8e2f9c776f8baf60a48e2c77f2a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49FD	28468 bytes
`font_01_sfnt_off00008a0f.bin` `a5b009a33d06eb91b5687aca452054299973906144ac3f9b2fc2dd0e2fef1dac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A0F	19260 bytes

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