PDF malware analysis — malicious · 26fd4a6cf3a84766

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 21:17:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b9bf0f7847d25df1b7a9c6e4b713aba9 SHA-1: dd13c9feade64ccff0b4ebf4b5d425a224271eff SHA-256: 26fd4a6cf3a8476626b11ff8214455577186a26a6331be863bdb4db367ddf0b5

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to game-related content, suggesting a link farm or content-laundering operation. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' heuristic further supports a malicious intent to trick users into downloading content. The document body, though heavily obfuscated, contains references to game hacks and download links.

Machine Learning

Nyx PDF Classifier malicious score 0.9628

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-roblox-svg-game-hack
- http://charivne.info/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/coin-master-hack-without-human-verification_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdf
- http://charivne.info/ckfinder/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/coin-master-today_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
- http://charivne.info/ckfinder/userfiles/files/free-robux-no-download_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/www-cheatsk-com-coin-master-hack_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/free-minecraft-resource-packs_GM479516143.pdf
- http://charivne.info/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
- http://charivne.info/ckfinder/userfiles/files/getrobux-come_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/roblox-toy-codes-free_GM431946152.pdf
- http://charivne.info/ckfinder/userfiles/files/free-robux-promo-codes-2021_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_off00004bbf.bin` `2a90090208e304401e75b455a14fa014d42dbea45be0f5fd87ef37c9f0bd1085`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BBF	25340 bytes
`font_01_sfnt_off0000867b.bin` `d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x867B	2820 bytes
`font_02_sfnt_off00009016.bin` `ec5774183871ac2310e227d04ff410a8fddd606c61ae0fc98d7f5044e57efae1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9016	18348 bytes

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