PDF malware analysis — malicious · 9d8c423dfea7ff42

MALICIOUS

PDF

50.2 KB Created: 2021-06-07 20:30:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 2c495892dcdc28653a6ee673039538b4 SHA-1: 68d9c7696dad99cd1056af17e4a1219079253685 SHA-256: 9d8c423dfea7ff426da17f0c8b92239482994dca3a20a90699fa8e1a51d2d0a2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous external links, many of which are structured as a link farm for SEO purposes, pointing to other PDF files. The document body and extracted URLs suggest a lure for downloading game hacks or cheats, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9789

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.tw/app/431946152/roblox-counter-blox-hacks-2021-june-injector-game-hack
- https://diendientuvn.com/public/upload/files/coin-master-free-spins-link-2021-app_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/coin-master-hack_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/free-spin-coin-master-link-today_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/is-minecraft-vr-free_GM479516143.pdf
- https://diendientuvn.com/public/upload/files/free-robux-no-verification_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/coin-master-daily-free-spins_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/roblox-hacking-youtube_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/mcpe-master-coin-hack-apk_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/blox-pink-robux-free_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/minecraft-java-edition-free-download-for-android_GM479516143.pdf
- https://diendientuvn.com/public/upload/files/coin-master-free-spins-today-39_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/get-free-spins-in-coin-master_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/free-robux-generator-no-verification-2021_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/free-spins-coin-master-links_GM406889139.pdf
- https://diendientuvn.com/public/upload/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdf
- https://diendientuvn.com/public/upload/files/coin-master-hack-apk-free-download_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005327.bin` `941e07b315562561cbac16a299dd25be2c90e63ba16761271ac0678bd531644a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5327	27612 bytes
`font_01_sfnt_off00009286.bin` `8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9286	3464 bytes
`font_02_sfnt_off00009ebc.bin` `dcc300490900fca48c433eaf9e978204f09acda471c3f4a8c09155682c375462`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EBC	19180 bytes

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