PDF malware analysis — malicious · 4118ca8320483cfb

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 15:50:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 56e40f3fa958857c8e3702bee83fe03a SHA-1: 5b26d0b6e6538b091325e24b7b5d73ca9168d840 SHA-256: 4118ca8320483cfb9bf1a20873e855b50f791f3d59a9dc7976527071ca38003d

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9865

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.online/app/431946152/island-life-hack-script-roblox-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-views-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-free-com_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-hack-apk-download_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
`font_00_sfnt_off00005121.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5121	24240 bytes
SHA-256: `76117359e8ff9788135855197682c29a5cca62611040236b07c63e37bcae1b21`
`font_01_sfnt_off0000887b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x887B	18756 bytes
SHA-256: `3da6a8f6022b207e524393e81e9dc806eb636bc0987d0b5f3cc94f49722cab45`

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