Sending a file to a remote clamd instance

I agree with jezzaaaa on the above answer, you can indeed configure the client/server accordingly with your needs. For example:

If you want a clamaV to be the server that will be doing the scanning and catch the infected files, here is the configuration for Ubuntu 20.04...

# Install the 'daemon and freshclam'
sudo apt remove -y clamav-daemon clamav-freshclam

Done, the server is now listening and waiting for requests.

# Install the 'clamdscan', this will install other things, you can remove them
sudo apt install -y clamdscan

# Remove the extra from the client machine
sudo apt remove -y clamav-daemon clamav-freshclam

Add the option TCPAddr and TCPSocket (TCPAddr 1.2.3.4 TCPSocket 3310) and remove (LocalSocket) from the client on /etc/clamav/clamd.conf file.

~$ clamdscan -v ~/infected-file.txt
~$ clamdscan -v ~/document-file.pdf

If the server and the client machines can communicate over port 3310, the outputs should be recorded on the server machines where you have the clamav-daemon running.