Picture and information of British-born teenager Nora Quoirin displayed at the search and rescue operation command centre in Kg Kolam, Seremban, where she went missing last Sunday.
The reward of 50,000 Malaysian ringgit, the equivalent of around £10,000, was donated by an anonymous Belfast-based business. "She is so precious to us and our hearts are breaking", the mother said in a recorded statement.
"We want to say thank you to each and every one of you".
Nora and her mother and father, who are Irish and french respectively, arrived in Malaysia from the United Kingdom - where they have been living for 20 years - on Saturday, August 3.
Nora Quoirin, 15, from London, vanished from the Dusun forest eco-resort, in southern Negeri Sembilan state, on Sunday.
Those with information may contact the police hotline at 011-12285058, while those outside Malaysia may email [email protected].
Nora's parents Meabh and Sebastian Quoirin issued a plea before the start of the weekend, thanking volunteers for their help. "We have no reason to believe she wandered off and is lost".
A fingerprint found on a window at the hotel room where the family was at the time Nora went missing is the focus of the local forensic team. When she was born, she needed operations to help her breathing.
Irish band Westlife, who performed in the country this week, asked their fans to help look for the missing teenager, the Malaysian Star publication reported.
Detectives also quizzed the taxi driver who took them from the airport to the resort, and are searching the home of staff working at the holiday destination.
The parents described their daughter as a "fun, amusing and extremely loving" girl who is also sensitive, shy and anxious outside the family. Family is her whole world and she loves to play games, like Cat Bingo, with us.
"Nora has always needed dedicated specialist educational provision, and now attends a school for children and young people with learning and communication difficulties". Armed members of the Senoi Praq, a special police team comprising indigenous tribes famed for their forest tracking skills, shouted "Nora!" as they waded through the hilly forest terrain.
"We are extremely impressed by the effort, your expertise, your dedication and we hope you find Nora".
"We are so grateful for everything you are doing for us", an emotional Meabh Quoirin told rescuers in the jungle.
The prints were at an open window in a downstairs hall, not in the bedroom upstairs where the girl was sleeping with her siblings, he said.