PDF malware analysis — malicious · 7a451457c3a0c114

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 02:23:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: e4d09df52d93a93fa34f28fbc07c7a02 SHA-1: 8dcf72e6b1da0ac5a921df163bbbe899b324e730 SHA-256: 7a451457c3a0c114d2eb30ad50000f5ce94f8cb710772b11db52a3cd54519944

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spamming operation. One of the embedded URIs, https://netcdn.xyz/app/406889139/master-coin-hack-game-game-hack, is suspicious and likely leads to malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

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/406889139/master-coin-hack-game-game-hack
- http://www.makoto.su/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
- http://www.makoto.su/images/free-robux-offers_GM431946152.pdf
- http://www.makoto.su/images/coin-master-free-spin-and-trading-group_GM406889139.pdf
- http://www.makoto.su/images/coin-master-free-cards-link_GM406889139.pdf
- http://www.makoto.su/images/how-you-get-free-robux_GM431946152.pdf
- http://www.makoto.su/images/minecraft-java-edition-download-free_GM479516143.pdf
- http://www.makoto.su/images/hacks-to-get-free-robux_GM431946152.pdf
- http://www.makoto.su/images/coin-master-links-for-free-spins-2021_GM406889139.pdf
- http://www.makoto.su/images/free-robux-stream_GM431946152.pdf
- http://www.makoto.su/images/free-roblox-clothes-for-your-avatar_GM431946152.pdf
- http://www.makoto.su/images/free-robux-that-actually-works_GM431946152.pdf
- http://www.makoto.su/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
- http://www.makoto.su/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
- http://www.makoto.su/images/minecraft-hacks-wurst_GM479516143.pdf
- http://www.makoto.su/images/roblox-free-items_GM431946152.pdf
- http://www.makoto.su/images/free-robux-hack_GM431946152.pdf
- http://www.makoto.su/images/legit-free-spins-coin-master_GM406889139.pdf
- http://www.makoto.su/images/free-robux-that-actually-works-2021_GM431946152.pdf
- http://www.makoto.su/images/free-roblox-toy-codes_GM431946152.pdf
- http://www.makoto.su/images/how-do-you-get-roebucks-for-free_GM431946152.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_off00004820.bin` `bc41e2aaa7a960ca5fb4427a604f2d8c3296f02d1aa52d7f5f4fe468fd3bf4cd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4820	24976 bytes
`font_01_sfnt_off000080f5.bin` `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80F5	2840 bytes
`font_02_sfnt_off00008aa7.bin` `61a7e5df1615dd2bed66e1a1700862b148b1481b00ec863c05290e253e9efb54`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AA7	17976 bytes

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