Cricket Australia says it is unaware of evidence linking their players to match-fixing but promised full investigation, if necessary.
The three explosions at the ground in the eastern city of Jalalabad also injured at least 57. Less than a week ago, a group of attackers stormed a government building in the same city, killing 15 and injuring 42.
Not since Australia beat England by 45 runs in Melbourne in 1877 in the first Test ever played has a team got off to a victorious start in cricket's premier format.
Disgraced cricketer David Warner has said he accepted the 12-month ban handed down to him by Cricket Australia for his role in last month's ball-tampering scandal in South Africa.
The highest bid fell short of the billion-dollar mark but it means the broadcaster will pay $9.24 million for every international match in the 2018-2023 period.
The result ranks as Australia's second-heaviest defeat by runs, their heaviest in 90 years, and the heaviest for any team in test cricket since 1934. And that was after a ball-tampering scandal.
The usually pugnacious batsman apologised to fans, team-mates, his family and the Australian public for a ball-tampering scandal that has rocked the cricket world.
South Africa lead the series 2-1 which has been hit by scandal after the Australians cheated in the third test. At stake in the final test is the first post-apartheid home series win for the South Africans, and for the visitors, their integrity.
Australian cricket teams' traditional baiting and belittling of opponents is under review as the country attempts to repair its battered reputation as a cricketing nation following a ball-tampering scandal.
Australia's coach Darren Lehmann will step down after the fourth Test against South Africa ends. The team's captain Steve Smith returned to Australia and broke down as he took "full responsibility" for the ball-tempering plot in Cape Town.
Opening batsman Cameron Bancroft received a nine-month ban following the scandal, which has outraged fans, jolted the sponsors and prompted CA to send the trio home from South Africa.
Steve Smith, David Warner and Cameron Bancroft were involved in a ball tampering plot in the third test against South Africa on Saturday.
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