The Barfi! actress dethroned the Jism 2 actress who is now dropped to ninth position in the study by security software maker McAfee.
The study also saw Bollywood superstars Shah Rukh Khan and Salman Khan occupy the No2 and No3 positions on the list respectively.
The top 5 was rounded up by Kareena Kapoor-Khan and Akshay Kumar.
Hackers used the names of celebrities to steal passwords and personal information from unsuspecting and celeb crazy fans who search the web for news and pictures of the favourite stars.
This year searches for the celebrity's name with search terms like wall paper, videos and nude pictures mostly lead to malicious sites.
The study used McAfee SiteAdvisor site ratings to indicate which sites are risky to search when attached to celebrity names on the web and calculated an overall risk percentage.
Miss World-turned-actress Priyanka Chopra who recently took to singing had 79 infected search results. While Shah Rukh Khan whose film Chennai Express broke all Bollywood records recently lead to 75 malicious sites. Bigg Boss host Salman Khan's name resulted in being lead to 68 infected sites.
Saif Ali Khan, Amitabh Bachchan, Farhan Akhtar and Hrithik Roshan rounded up the list of the top 10 most dangerous celebrities online.
Interestingly Katrina Kaif, Bipasha Basu, Deepika Padukone and Aishwarya Rai-Bachchan have all dropped out of the list this year.
On the Hollywood list, actress Lily Collins was the most dangerous celebrity.