I understand you're looking for the Cloudera QuickStart VM (version 5.13.0) for VirtualBox. However, I should clarify a few important points:
Would you like help with alternative Cloudera environments for learning Hadoop/Spark instead?
Cloudera has retired the QuickStart VMs and they are no longer officially available for download from Cloudera's main website. The 5.13.0 version is quite old (from around 2017).