PDF malware analysis — malicious · f68aee26607c9105

MALICIOUS

PDF

36.7 KB Created: 2021-07-09 02:55:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 8874281ad3294ab9f699d8138c482401 SHA-1: cc39d8cff9872aa1639c7d548c5d62bb293019e2 SHA-256: f68aee26607c9105220b50d29a198eb6962a6d8bd7f7b4b1748cdab033c981c0

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/coin-master-free-coins-and-spins-game-hack, is identified as a redirector to a malicious website. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack vector.

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.tw/app/406889139/coin-master-free-coins-and-spins-game-hack PDF link annotation
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-roblox-groups_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-hack-roblox-accounts-on-android_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/como-descargar-roblox-hackeado-para-pc_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-admin-jailbreak-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/free-ninja-animation-for-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
- https://www.jcn-revalidation.co.uk/uploads/files/files/roblox-card-hack-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_002_off00003680.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3680	23944 bytes
SHA-256: `abe522b27eec1ed1c7f599906aa8a40c4005e81ba10aaf9aa14d6d7d0a25ef61`
`font_01_sfnt_off00006cb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CB2	18348 bytes
SHA-256: `8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8`

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