PDF malware analysis — malicious · cf3f44efcda52fa2

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 01:00:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: f1078b4c81f673690340f938dcd11320 SHA-1: a4dbae89649d29ec0088a5bcdaa469e61e61f6a0 SHA-256: cf3f44efcda52fa29c187c6d1abbe364332f5f672a6c9fd6d96436d46d748087

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that promotes 'free Robux' and 'Coin Master' cheats, indicative of a scam or phishing lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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/free-robux-scams-game-hack
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-script-hacks_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/today-free-spin-coin-master_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-spins-for-coin-master_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-hack-tool-without-human-verification_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-roblox-account-generator_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-zone-free-robux_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/robux-free-online_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-cheat-robux_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-spin-ml-link_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-download-pc-free_GM431946152.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/get-free-spins-on-coin-master-links_GM406889139.pdf
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coins-and-spins-coin-master_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_003_off00004ac1.bin` `51da438de9218175ff317b1c52367beb36eb96f2053368f43a520e1d3d066ad0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AC1	25672 bytes
`font_01_sfnt_off0000862d.bin` `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x862D	3884 bytes
`font_02_sfnt_off000092d5.bin` `f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92D5	18500 bytes

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