PDF malware analysis — malicious · cc5e0d3a9bf0c323

MALICIOUS

PDF

46.1 KB Created: 2021-06-10 17:55:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b18336f8fb95d1d156aa432379b7c4c3 SHA-1: 6aa464a316781bc824353fd8a5a3feffbed5f6b9 SHA-256: cc5e0d3a9bf0c323ebf02e23c3a16d8ce4c46118db723489b87927583495bffd

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and extracted URLs indicate a lure related to obtaining free in-game currency or items for games like Roblox and Minecraft. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common method for exploiting PDF vulnerabilities or redirecting users, hence T1059.007 is included.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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/pastebin.come-robux-hack-game-hack
- https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/roblox-guest-shirt-free-2021_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/robux-free-co_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/minecraft-login-free_GM479516143.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/anyway-to-get-free-robux_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/hack-pour-avoir-plein-de-lgendaire-roblox-bubble-gum_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/roblox-zone-free-robux_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/arsenal-hacks-roblox_GM431946152.pdf
- https://www.kofordconverting.com/uploaded_files/userfiles/files/cool-roblox-shirts-free-shipping_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005649.bin` `c2b7cc96a13d96108a51218c7bac94de0c1320020d9639a687a0a788d678a684`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5649	25160 bytes
`font_01_sfnt_off00008fc1.bin` `3535b4cc6ff8095ea997d03c4fb9013feb6ce8f455509778d5f29abc5a80694d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FC1	18952 bytes

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