PDF malware analysis — malicious · 7027e0973ce9108f

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 15:05:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 7696d87eeb29731f176f70ae98c7bccf SHA-1: 3f915bae2aac30d9cc81e07af6ce6ed4adb05535 SHA-256: 7027e0973ce9108f4b72290f0d9504816a8141b4bc0d44775109a0c7fd2e9b85

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 0.9832

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/free-robux-generator-no-verification-2021-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-32-mod-hack-unlimited_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/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-client_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/pubg-mobile-uc-qatar_GM1330123889.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/pokemon-go-free-coins-apk_GM1094591345.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-today_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-no-survey_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-link-2021-today_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_004_off00005b23.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5B23	25748 bytes
SHA-256: `2609b3da57cdc10b1e267594f4797c04ebe1d59bea7b1fea69ee86504d506fe3`
`font_01_sfnt_off000095b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95B8	19004 bytes
SHA-256: `d45ec0ea85e3f4da21cb27ccd2cd6df352304457fff04a0939a67aeffe4f8bf1`

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