Corruption in mariadb binlog

I have an installation with mariadb version 10.0.21. I need to backup the binlog file every 5 minutes to TSM, but as the binlog is being written every second, i am afraid of the file getting corrupted when copied. Is it possible that this happens? If the binlog gets corrupted (the end of it), will it corrupt the entire file or i can discard the last lines? Any other solution proposed? We already have replication with master/slave, but for security and audit reasons, we need to keep a copy of the binlog. Regards