The package cloud.google.com/go version v0.123.0 is not classified as malware. While the YARA rule kill_unusual matched in multiple files (README.md, shell script, and Go source file) and a file extension mismatch was detected, these are not strong indicators of malicious activity. The kill_unusual matches appear to be related to the intended functionality of the httpr tool, which involves sending signals to processes. The file extension mismatch is also not a strong indicator of malware. Furthermore, the package is published by a reputable project (googleapis/google-cloud-go) with a significant number of stars and forks, which adds to the confidence that it is not malicious.