PDF malware analysis — malicious · b6647228b997d42c

MALICIOUS

PDF

47.6 KB Created: 2021-06-09 15:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: dc8e28c71802704060272dca9ddf09ec SHA-1: bd45a861ece2f4f8f79702a05acbedc59db9fd1e SHA-256: b6647228b997d42c5e05fd007371da36b12ddb9ac8960469678151756585edaa

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The primary URL, 'https://netcdn.tw/app/431946152/joshy-roblox-hack-virus-game-hack', along with others hosted on 'tdbaska.hr', are likely intended to host or redirect to malicious payloads. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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/joshy-roblox-hack-virus-game-hack
- http://www.tdbaska.hr/files/coin-master-hack-version-download-2021_GM406889139.pdf
- http://www.tdbaska.hr/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
- http://www.tdbaska.hr/files/free-robux-working_GM431946152.pdf
- http://www.tdbaska.hr/files/free-robux-place_GM431946152.pdf
- https://www.tdbaska.hr/files/daily-free-spins-coin-master_GM406889139.pdf
- https://www.tdbaska.hr/files/how-can-you-get-free-robux_GM431946152.pdf
- http://www.tdbaska.hr/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
- https://www.tdbaska.hr/files/1-000-free-robux_GM431946152.pdf
- http://www.tdbaska.hr/files/how-do-you-hack-roblox_GM431946152.pdf
- https://www.tdbaska.hr/files/rbx-hut_GM431946152.pdf
- https://www.tdbaska.hr/files/how-to-get-free-robux-on-pc_GM431946152.pdf
- https://www.tdbaska.hr/files/minecraft-apk-free-download-016-0_GM479516143.pdf
- https://www.tdbaska.hr/files/how-to-get-free-robux-hack_GM431946152.pdf
- http://www.tdbaska.hr/files/roblox-fly-script-cheat-engine_GM431946152.pdf
- https://www.tdbaska.hr/files/master-coin-hack-mod_GM406889139.pdf
- http://www.tdbaska.hr/files/coin-master-free-spins-glitch_GM406889139.pdf
- http://www.tdbaska.hr/files/coin-master-fan-page-giveaway_GM406889139.pdf
- https://www.tdbaska.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdf
- http://www.tdbaska.hr/files/minecraft-bedrock-free-with-java_GM479516143.pdf
- http://www.tdbaska.hr/files/funbloxxyz-free-robux_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_off0000506d.bin` `1b076b92690c620b7bcd80dfaa69f5c69fc0b4b604a800830ff550ab040496fa`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x506D	31860 bytes
`font_01_sfnt_off00009573.bin` `75b692998dbcf3972951456c1d558e8a7fd394791be9d8e7896ca3da21c33620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9573	19088 bytes

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