PDF malware analysis — malicious · ff44bbf023697cda

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 22:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c1c19d8a1f63847b1f9d26c68025ffbe SHA-1: cc5af911b5a7900ea8a42c9db3fef4d154bcb8c2 SHA-256: ff44bbf023697cdaf6edf8d2653a47bd7d88723323f1f0d55886df4a22320176

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a specific URL in its body text, all pointing to websites offering game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and structure strongly suggest it is designed to redirect users to potentially malicious sites for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-game-hack PDF link annotation
- http://fourieredu.cz/files/ckfinder/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-pokemon-go-accounts-level-30-2021_GM1094591345.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/wurst-download_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://www.roblox.com/.IIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000312e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x312E	22692 bytes
SHA-256: `c72d0590f095f8ceeba5e13ed48fae0bb083779b852532621db13956b850b3bb`
`font_01_sfnt_off00006415.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6415	19064 bytes
SHA-256: `8c571bf80081aaa5c2be303b8c9fe18b31c5334a74c17f7b55d65649f5ee093a`

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