PDF malware analysis — malicious · fcf88c7252a02b70

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 22:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4b60f77749e313c7b1b7fc2defd5580c SHA-1: 86c4985b0318b8df8a0dff93fab279fc89c4de48 SHA-256: fcf88c7252a02b70ef5da5af9508167ee0be49037ba8748b544b90d824fe7951

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link within the document body, all directing users towards game hack generators and free in-game currency. The heuristic firings confirm this lure, with the ML classifier strongly indicating maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious sites for credential harvesting or malware download.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/free-spins-on-coin-master-app-game-hack PDF link annotation
- https://adoz.cz/ckfinder/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/easy-robux-today_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://adoz.cz/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn 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
`stream_003_off000049d6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49D6	26136 bytes
SHA-256: `d2dd47839f6bfa103bc5627ced095a22c548906e477dc10202ee1df3e7b0a56d`
`font_01_sfnt_off000085ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85AC	17884 bytes
SHA-256: `e35eb77d1e434a4a4433bf7d50e70c108b9e33857f20e35365727ea7a7255123`

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