PDF malware analysis — malicious · 3f59b6e9200e80e8

MALICIOUS

PDF

34.7 KB Created: 2021-07-01 12:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a9941003f68ecda527655e0a970369cf SHA-1: a084cb8d884023076d15e81104692216b7c56f44 SHA-256: 3f59b6e9200e80e811231decaeae391f0d04624c3d7addcb8c2aa5a6fe9983ff

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning 'Robux Hack', and includes a link to a suspicious URL. This URL is identified as a high-risk finding and is likely intended to deliver a malicious script. The ML classifier also flagged the PDF as malicious with high confidence.

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 http://netcdn.co/app/431946152/script-for-robux-hack-game-hack PDF link annotation
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/code-to-have-all-free-roblox_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-working-websites-no-human-verification_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/roblox-download-for-windows-7-free_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-hack-roblox-accounts-without-inspect-element_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/roblox-weight-lifting-simulater-hacks_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/hack-roblox-servers_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-flame_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
`font_00_sfnt_off0000303c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x303C	22348 bytes
SHA-256: `0d319b24d83751c70f01857627de4a4101f15de1135cc8dfb5dbf6cf6de87a0a`
`font_01_sfnt_off000061ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61EF	19288 bytes
SHA-256: `79ca857d25267b52dc71801ee6889d8fcc04b7c38ece4269b6a13d27f2c21ce6`

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