Many .rar files from forums are password-protected. Look at the site where you found the link; the password is often the site's URL.
To help you find the right "paper" or file, could you clarify: ШЄШЩ…ЩЉЩ„ date400 rar
Use a tool like VirusTotal to check the file for malware. ШЄШЩ…ЩЉЩ„ date400 rar
Knowing the (e.g., "It's for my office accounting software") will help me find the specific resource you need. ШЄШЩ…ЩЉЩ„ date400 rar