PDF malware analysis — malicious · 41aa7a646449411d

MALICIOUS

PDF

37.2 KB Created: 2021-06-30 07:19:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: afa85a9ab63978e9eacb623975899b48 SHA-1: f46cad14700f40b006fc31dd74977a7d05b1c25e SHA-256: 41aa7a646449411d314c0e70d144d305dbe10c8b7e665720cabd457d3e2823f7

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to various gaming-related topics. The primary URL, http://netcdn.co/app/431946152/get-free-roblox-private-servers-game-hack, suggests a lure for free game items or hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm is a common tactic for SEO spam or distributing further malicious content.

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.co/app/431946152/get-free-roblox-private-servers-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-rewards_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/earn-robux-sites_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/hack-prison-life-roblox-noviembre2021-br-5-370-vistas_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-hack-players-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-shirt-roblox-marmelllo_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/app-for-pubg-uc_GM1330123889.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/tests-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.roblox.com/.IIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003852.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3852	23208 bytes
SHA-256: `435394e4a59623db371e76e484d84108e5669bed8bdc3372e4fae98d97d6523c`
`font_01_sfnt_off00006c37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C37	19144 bytes
SHA-256: `c347cd27dfec04a9888d51e1bc6bffb3cae82f4a7e29b691efc83b6862c2b82d`

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