On Windows 7 SP1, Windows 8, and Windows 8.1:
Theoretically, yes. But again, you are trusting that the .rar creator did not tamper with the file. Always prefer the .exe directly from microsoft.com or download.microsoft.com . net framework 4.0.30319.rar
Microsoft .NET Framework 4 (автономный установщик) On Windows 7 SP1, Windows 8, and Windows 8
: Downloading system components from third-party file-sharing sites in .rar or .zip format is a common way for malware or adware to enter a system. On Windows 7 SP1