I’ve recently been getting Splunk reports on my RTC_message_logs and I have no idea what it means, I definitely haven’t downloaded Splunk at any point and I’m wondering why it’s suddenly popping up.
Based on your posting history, it looks like you're paranoid about someone remote-installing malware on your device. Checking crash logs like these won't help, but Amnesty International released a piece of software called Mobile Verification Toolkit that will help detect traces of malware. There's a 99.9% chance you're not the target of iOS spyware.