Salticidae, should be a male Opisthoncus mordax. Please, verify! Assuming the ID from the link above is correct! It is from this site, which looks trustable:
http://ednieuw.home.xs4all.nl/australian/salticidae/Salticidae.html
And it is quite a tricky genus to ID!!
http://knowledgebase.lookseek.com/Biting-Jumping-Spider-Opisthoncus-mordax.html
http://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:4694e36d-9978-4f46-a6c8-112a92167f7b#tab_gallery
http://www.peckhamia.com/salticidae/diagnost/opisthus/sp-austral-nie-ph.htm
http://www.findaspider.org.au/find/spiders/456.htm
https://www.flickr.com/photos/robertwhyte/4294418503
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