An Afghan asylum seeker who arrived in Australia illegally by boat held a foreign university hostage and subjected her to six hours of sexual assault after luring her to a hotel using a bogus job ad.

Mokhtari Alimadad, 42, of Dandenong, Victoria, lured his young victim to a Melbourne motel on May 6, 2016 under the guise of offering her a job as a sales assistant on Gumtree.

But the one-time Afghan soldier, who worked for the coalition forces, had no intention of employing the traveller from Lithuania.

Mokhtari Alimadad, 42, of Dandenong in Victoria lured his young victim to a Melbourne motel under the guise of offering her a job and raped her.

Mokhtari Alimadad was a self-employed builder before becoming a rapist. He came to Australia illegally on a boat and later brought his family here

Mokhtari Alimadad is in jail and faces deportation after being found guilty of raping a student he lured through a job ad.

The father of three had more sinister things on his mind and immediately went about trying to ply the woman with booze and methylamphetamines.

He asked her for sex.

She refused and the self-employed builder apologised, but Alimadad had no intention of letting the student walk away.

He then pulled her into his motel room, in Keysborough, where he repeatedly raped and threatened to kill his victim over a terrifying six hours before she escaped.

The County Court of Victoria heard Alimadad barked like a dog and lashed out at invisible people in between sexual assaults and rapes.

Alimadad, a father-of-three came to Australia illegally and now faces deportation after being found guilty of his crimes

He was found guilty after a jury trial of four counts of rape and one charge each of sexual assault and false imprisonment.

His victim told the court she had been left deeply traumatised by her ordeal and would never be the same.

'No-one can understand how disgusting and how rotten everything looks after rape. It's indescribable,' she wrote to the court.

The woman said she now suffered from panic attacks and lived in constant fear of men.

Mokhtari Alimadad enjoys a coffee while on the job. The only coffee he drinks now is instant

Mokhtari Alimadad tests out what would become his courthouse suit after being found guilty of raping a young student he lured to a motel through Gumtree.

'My personal life has been destroyed,' she wrote. 'Life is a shadow.'

But Alimadad has shown no remorse for his crimes and was supported in court by his wife and three young children - aged 18, 16 and an infant.

He had come to Australia on a boat with the help of people smugglers and when he was granted permanent residency his family joined him.

Judge Scott Johns described Alimadad's offending as 'grave' and condemned him for his behaviour.

'He's let his family down spectacularly - catastrophically,' he said. 'He's got no-one to blame but himself. It falls at his feet.'

Judge Johns said Alimadad faced a 'significant sentence' for his offending, which was aggravated by his lack of remorse.

'He ran a trial ... in an absurd fiction that he's the victim somehow,' he said.

Alimadad's barrister attempted to describe his client's bizarre behaviour as if he had had an 'out of body experience'.

Police claimed he was simply drunk.

Crown prosecutor Stephanie Clancy said Alimadad continued to attack his victim even while she repeatedly shouted that he was raping her.

'He was well aware of what he was doing,' she said.

Alimadad will be sentenced later this month.