PDF malware analysis — malicious · d49a4a845082942b

MALICIOUS

PDF

43.9 KB Created: 2021-06-07 12:01:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: c41701e224ac1641c0bcf7f7085d556c SHA-1: 8bd70edf206b7d66905df900a34cd6047a101667 SHA-256: d49a4a845082942b8d17d3d0fc680bb59fbd4eb115160642ccf75184b2add269

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary URL that suggests it is a hack script for the game Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are also PDFs, suggesting a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to deliver malicious content or redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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-shinobi-life-hack-script-game-hack
- http://yochin.org.tw/images/coin-master-free-spin-link-app_GM406889139.pdf
- http://yochin.org.tw/images/coin-master-village-4_GM406889139.pdf
- http://yochin.org.tw/images/wurst-112-2_GM479516143.pdf
- http://yochin.org.tw/images/coin-master-free-spins-ios-app_GM406889139.pdf
- http://yochin.org.tw/images/coin-master-100-spin-slot_GM406889139.pdf
- http://yochin.org.tw/images/free-spins-coin-master-blogspot_GM406889139.pdf
- http://yochin.org.tw/images/lazy-blocks-com-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/real-free-robux-codes_GM431946152.pdf
- http://yochin.org.tw/images/roblox-group-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-no-human-verification_GM431946152.pdf
- http://yochin.org.tw/images/coin-master-free-spins-hack-link_GM406889139.pdf
- http://yochin.org.tw/images/earn-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/how-to-make-a-minecraft-client_GM479516143.pdf
- http://yochin.org.tw/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
- http://yochin.org.tw/images/coin-master-gold-cards-hack_GM406889139.pdf
- http://yochin.org.tw/images/pokemon-go-free-avatar-items_GM1094591345.pdf
- http://yochin.org.tw/images/wahoo-gaming-co-free-robux_GM431946152.pdf
- http://yochin.org.tw/images/free-robux-no-verification-no-download_GM431946152.pdf
- http://yochin.org.tw/images/how-to-get-coin-master-card-free_GM406889139.pdf
- http://yochin.org.tw/images/how-to-hack-roblox-for-robux_GM431946152.pdf
- https://www.roblox.com
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004e42.bin` `2bfa12324ebc3f82d64da78de171f400c64c9516e51ca3554b63a24463d61b62`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E42	24780 bytes
`font_01_sfnt_off00008794.bin` `779d796cb20cbfdee2064e869ff86c50542acab80aa1b6bd8ed67f3c5d994cb8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8794	18748 bytes

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