PDF malware analysis — malicious · 8005cf5d8db076e5

MALICIOUS

PDF

50.7 KB Created: 2021-06-03 10:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d0b1eff9cfbe20087249c0200ec60f07 SHA-1: d669b2aa5b83a1c68d14a6249099aeb73e05cefb SHA-256: 8005cf5d8db076e56ed166b9122473a8d4162129ed53169743064bd10fb3b81e

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to websites offering 'free Robux' or 'free followers' for Roblox, indicating a likely scam or phishing lure. The presence of a 'PDF_SEO_LINK_FARM' heuristic firing suggests a large number of these links were generated programmatically. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9681

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.online/app/431946152/roblox-free-followers-game-hack
- https://ifef.es/ckfinder/userfiles/files/to-get-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/can-you-give-me-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-spins-coin-master-app_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-games-like-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/try-coin-master-hack_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux-today_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-35-13-hack-download_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-studio-free_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000523a.bin` `4f60b2d3ed9c71c637acf96f8dfff15bd28ed29ec4e1ca4cd36eadbe0ae306be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x523A	25444 bytes
`font_01_sfnt_off00008cc4.bin` `5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CC4	2872 bytes
`font_02_sfnt_off0000967b.bin` `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x967B	5696 bytes
`font_03_sfnt_off0000a38d.bin` `09eaf6273d9322970c88a31482dbdf968207cb1ef73b55d7fd121c1bcc1f7e48`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA38D	18112 bytes

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