In an indirect way, yes, some of the profit LM makes on the F-35 contracts does flow to internal R&D projects that may ultimately contribute to a black program. But actual black programs are funded by Congress. Even the most secretive, unacknowledged special access programs still have someone on the intelligence or defense committees giving the thumbs up to allocate money towards some department or agency's black budget. There would simply be no need to illegally launder money through another program unless LM was intent on using that money for criminal activities.

I'm sure it's been done elsewhere, look at Iran-Contra, but it just wouldn't be done for something like a defense contractor building planes. It would be completely unnecessary and likely illegal.