The author is so lazy so…
Please
visit: http://www.malaysianbar.org.my/legal/general_news/what_you_need_to_know_about_the_pdpa.html
and
http://www.pdp.gov.my/images/LAWS_OF_MALAYSIA_PDPA.pdf
In short you are breaking the the law if your acquire others personal contact details and use it without the owners’ consent.