PDF malware analysis — malicious · a4d81ff9baa6a4ff

MALICIOUS

PDF

45.6 KB Created: 2021-05-18 05:37:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 1945f909fa77ff3494a136ff365f6b68 SHA-1: 7a3d43746d7b20ae7c40316ffb3cad9996815a1a SHA-256: a4d81ff9baa6a4ff1467231925217cf0a073741d33e898f9f23a5b61ff5287e2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to external resources that appear to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to game cheats or hacks, and the presence of a 'download button' heuristic further supports a malicious workflow. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to direct users to download potentially harmful files.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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/479516143/minecraft-free-unblocked-game-hack
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-hacks-free-spins_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-spins-for-free_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/minecraft-mod-updater_GM479516143.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/hack-coin-master-no-human-verification_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-2021-spin-link-today_GM406889139.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-roblox-wings_GM431946152.pdf
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/www-bandicam-com-free-robux_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_off00004bde.bin` `3bb6db51cd74ee47af709a838d69962d6ac01a3e719a0e17638b3f8856574cce`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BDE	25748 bytes
`font_01_sfnt_off00008538.bin` `eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8538	2940 bytes
`font_02_sfnt_off00008f48.bin` `4446ec9a14b3bfac30f066e0e962bc7f96b5cea98edad6ed93b9652aaf8297cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F48	18472 bytes

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