In the Name of Allah, the All Merciful, the Mercy-Giving

 

All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad.

 

If your friend has broken the laws concerning her visa, then she has committed a sin by disobeying the authorities that have laid these laws for the organization of public interests.

Regarding the money she acquired there, however, as long as she acquired it in return for a lawful job, then it is a lawful earning. She may use this money to go to hajj; and we ask Allah to accept it from her.

 

Allah Almighty knows best.