Whitepaper that gives exploitation and overview details on the Log4j vulnerability as noted in CVE-2021-44228.
You can download it from the following link: https://packetstormsecurity.com/files/download/165669/CVE-2021-44228_Log4Shell.pdf
Source: https://packetstormsecurity.com/files/165669/CVE-2021-44228-Log4Shell-Overview.html