PDF malware analysis — malicious · 7f9b9f7bed3fd6f4

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 06:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 8a064d20af8dc5cb47dc4b508a7e7c6a SHA-1: 1cd20ebf0343823be61f40e661ee43806f16da95 SHA-256: 7f9b9f7bed3fd6f4fcf12c94033730a91055c1317716aa3be1abfbb2c2223ce0

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a game hack lure, specifically targeting Coin Master. The embedded URL http://netcdn.co/app/406889139/coin-master-hack-https-coinms-net-game-hack is highly suspicious and likely leads to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to redirect users to a potentially harmful resource, possibly for credential harvesting or malware delivery.

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/406889139/coin-master-hack-https-coinms-net-game-hack PDF link annotation
- https://www.ramsburyestates.co.uk/uploads/files/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/robux-sites_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
- https://www.ramsburyestates.co.uk/uploads/files/files/free-coin-master-hacks-no-verification-or-survey_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_002_off00003074.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3074	23188 bytes
SHA-256: `81e157b1ddbe6d6a8fe8db6809f7a634cf8cd2b560e3c11da3ef7f1b3dbfa672`
`font_01_sfnt_off000064cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64CC	18440 bytes
SHA-256: `d4a0ce670d7ff27a0341fb2a5bc1c8134718dc63ae2ec70999bf7230e535e219`

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