If you only have part1 , you cannot extract the contents. You need all files labeled part[x] .
You need a program like WinRAR (official) or 7-Zip (free/open-source) to handle the archive. apulfmqs.part1.rar
Disclaimer: This information applies to the file format in general, as I do not have access to the contents of that specific file. To assist you further, please let me know: If you only have part1 , you cannot extract the contents