Yes, I used an effect. Here's just a plugged-in guitar with no effects. What I also noticed during the recording is that I hear this sound only on the bridge pickup, there is no such sound on the neck pickup. It's really barely audible (in the second half of the recording), you can hear it in the background, at the moment of hit. Perhaps, of course, I'm making this up, and there are no problems with the sound, and I'd rather work on other ‘unwanted’ sounds while playing instead.
bridge:
bridge.wav
neck:
neck.wav