Files with this designation from unofficial sources (third-party websites) are often used to distribute malicious software or apps designed to stream copyrighted content without authorization [1, 2].
If you are asking about this file because you are concerned about security, I can help you find steps to scan your device or look up malware reports on that specific filename. Kshaw_base.apk
Only download applications from trusted, official stores like Google Play. official stores like Google Play.