This seems to be the relevant bit from the DpkgTerminalLog.txt about why it's failing:
VBoxManage: error: The installer failed with exit code 1: VBoxExtPackHelperApp: error: World writable: '/usr'
You should double check the permissions on /usr to make sure they're correct.
This seems to be the relevant bit from the DpkgTerminalLog.txt about why it's failing:
VBoxManage: error: The installer failed with exit code 1: VBoxExtPackHelp erApp: error: World writable: '/usr'
You should double check the permissions on /usr to make sure they're correct.