PDF malware analysis — malicious · afb2b0c664491551

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 13:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 9652783fdbd22d8262105f4da15402b0 SHA-1: ca1acd7e1963d3d245b7849e02a4deb4a0157837 SHA-256: afb2b0c66449155183ddb76e5d0321d9b3f28aa9a3672d49b01f9e22d7ddb48a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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-generator-without-human-verification-game-hack PDF link annotation
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/vip-roblox-free_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_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_off00004b07.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B07	27148 bytes
SHA-256: `065f0a3de1b7fbde6f97bfef77410c11c7be19b05f51cd4f21d99acb59af0ef8`
`font_01_sfnt_off00008a18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A18	19224 bytes
SHA-256: `40a7d61fbe05f3c06cc4b4f213318e5db23b17d00e7c534d307fd6e415ac6071`

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