Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
mălĕfactor, ōris, m. [malefacio, properly, an injuring; hence], an evildoer, malefactor (Plautin. and post-class.): malefactorem amitti satiu’st quam relinqui beneficum, i. e. it is better to let a malefactor go unpunished than to be ungrateful towards a benefactor, Plaut. Bacch. 3, 2, 11: ad vindictam malefactorum, Vulg. 1 Pet. 2, 14.