The string is likely a randomly generated file name, often used in automated downloads, temporary caches, or malicious software.
Check if the size (924...) matches what you expected. Small zip files often contain "scripts" that infect computers. What this file could be Download: pUa7y8imw8yrgeWk0pg07rC534W.zip (924....
The .zip extension means it contains other files; these can hide executable malware (like .exe or .js ). The string is likely a randomly generated file
Sometimes browsers save temporary files with names like this. often used in automated downloads
Only open it if you explicitly requested a download from a trusted site.