PDF malware analysis — malicious · a921b41c6725713e

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 09:25:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 546567776135425d71a458844a4379a7 SHA-1: 581108f1bf5e3e3fdb74f5e7b99863a6874b7640 SHA-256: a921b41c6725713e65cf9000eec384717acfdb3d0e0f33b9747ee88d4e1b29f8

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or scamming attempt. The document body and extracted URLs point towards lures for 'free Robux' or 'Coin Master spins', which are common themes in such malicious documents. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/rbxoffers-earn-free-robux-game-hack
- https://www.shin.ge/images/free-robux-websites-that-work_GM431946152.pdf
- https://www.shin.ge/images/free-robux-no-gift-card_GM431946152.pdf
- https://www.shin.ge/images/win-free-robux_GM431946152.pdf
- https://www.shin.ge/images/how-to-give-robux-on-mobile_GM431946152.pdf
- https://www.shin.ge/images/free-spin-link-coin-master_GM406889139.pdf
- https://www.shin.ge/images/download-hack-coin-master_GM406889139.pdf
- https://www.shin.ge/images/free-robux-without-verification-2021_GM431946152.pdf
- https://www.shin.ge/images/roblox-games-with-free-radio_GM431946152.pdf
- https://www.shin.ge/images/free-coin-master-spins-and-coins_GM406889139.pdf
- https://www.shin.ge/images/free-ways-to-get-robux_GM431946152.pdf
- https://www.shin.ge/images/get-free-spins-in-coin-master_GM406889139.pdf
- https://www.shin.ge/images/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdf
- https://www.shin.ge/images/make-robux_GM431946152.pdf
- https://www.shin.ge/images/robux-free-2021_GM431946152.pdf
- https://www.shin.ge/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
- https://www.shin.ge/images/daily-free-spins-and-coins-coin-master_GM406889139.pdf
- https://www.shin.ge/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
- https://www.shin.ge/images/play-minecraft-pocket-edition-for-free_GM479516143.pdf
- https://www.shin.ge/images/free-spins-coin-master-hack_GM406889139.pdf
- https://www.shin.ge/images/coin-master-free-coins-link-blogspot_GM406889139.pdf
- 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_off00004b37.bin` `5096eb369aa6d9eff40992af9e6502ae81b72e3d7b5e92a32f21e9075df83c87`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B37	25216 bytes
`font_01_sfnt_off0000856f.bin` `fa7b58e8bbd6048af1f0a6b5440a1dcdf7c9ae2c9f232fd911927377916bfdb1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x856F	18244 bytes

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