PDF malware analysis — malicious · 4d9654bac7da9700

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 16:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 6537040bb52672749d0eb5dc284519a5 SHA-1: 3d35e73e063b68bbbd40eef2a167841471fe13f7 SHA-256: 4d9654bac7da9700f948cd32db2c9e24ab00df667924af4787de33dcacfb4733

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 0.9796

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.online/app/406889139/coin-master-daily-spin-free-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/tiktok-for-free-install_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-executor-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-password_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000054ee.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54EE	25032 bytes
SHA-256: `36787a7cee4801f174e25403ab344cc5d1e8064f226a789099146a7daf15b1d4`
`font_01_sfnt_off00008ec1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EC1	4124 bytes
SHA-256: `f638292427b755dd7bf77c43889fd908fca246f613cf97d028c0485efebd01ce`
`font_02_sfnt_off00009cc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CC6	18308 bytes
SHA-256: `213ea0fed5678e19eff32fcc5d46e69a4f1b73f67043b57a178cf12547108d4a`

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