By the mud you meant (more likely) midrange at about 1kHz and bass below 300..200Hz. Just cut them out. For more bright sound bust some highs. There's a parametric EQ in PF/GB, but it's not that convenient, and, firstly, it's better to do such things at the mixing stage. Play with the EQ! Make something like that (not exactly that of course):
...and try to move the second horizontal slider back and forth, raise the third vertical slider if you hear a lack of highs... Using just simple EQ you can do a lot with your sound.
If you have no need in "distant" sound, just turn the reverb off and set a mic distance to 0%.
If it's still of no use, try other amps and cabs, other effects, try different pickups positions... change the strings.
If it's all useless, throw away this devilish piece of wood you're calling guitar, for Gods' sake!