PDF malware analysis — malicious · 1bb1746ead0fbb7c

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 01:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 83217b11d36c0fd6a9e9f529f8e55b3a SHA-1: 6377cc1ffcbab510e68e0cbc75a69d0221c710df SHA-256: 1bb1746ead0fbb7cc1695d5a0b121e97410913229b33f1699db9d324a54ee653

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting users interested in 'Coin Master' game cheats. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-daily-game-hack, is presented as the primary lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to direct users to a malicious site, likely for credential harvesting or further malware delivery.

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/coin-master-free-spins-daily-game-hack PDF link annotation
- https://www.dahu-villa.com.tw/upload/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/actual-free-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-hack-apk-35-18_GM406889139.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_off000048d4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48D4	25148 bytes
SHA-256: `5058730843db9dbf7430ece2771604ebab76889123209ce1d193b082d246c3e7`
`font_01_sfnt_off00008253.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8253	18308 bytes
SHA-256: `220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9`

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