PDF malware analysis — malicious · 96b17640fbb58527

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 05:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: c29ffba7b4c4835659b5b3b3afecd90d SHA-1: a99653ca6bf444d7bd75730568de47bccb4de2bb SHA-256: 96b17640fbb585274faf73747c1c3bc5d55811dddac2b53aa46902dda3beb2d6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it's a lure for game hacks and free currency, directing users to external URLs. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to phishing sites or further malware downloads, consistent with a spearphishing attachment attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-earn-game-hack PDF link annotation
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/fbchampion-com_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-coin-app_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
- https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004aa7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AA7	27196 bytes
SHA-256: `3096cdbfb8c4a699131280dc4db081293409092ab88c9ca8536369ec7ec9da58`
`font_01_sfnt_off000088e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88E5	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off000095f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95F7	18244 bytes
SHA-256: `b6014a1bf70a80b5b7176295bd11553985cf3fccea183fb301f46a2e8db4226f`

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