* Cuscaden offering S$2.4/share vs Keppel's S$2.351 bid

* Keppel sticks to its final offer

* SPH's shareholders need to first reject Keppel's bid

* Cuscaden's bid needs to be approved by SPH's shareholders

* Cuscaden eyeing social media to reach out to shareholders

Nov 16 (Reuters) - Cuscaden Peak, which trumped a bid to take control of Singapore Press Holdings (SPH), is seeking support from SPH's shareholders to vote against its rival's offer as it aims to seal the deal, a senior executive told Reuters.

The comments come hours after Keppel Corp on Tuesday said it would stick to its final offer following Cuscaden's sweetened nL1N2S50O1S$3.9 billion ($2.9 billion) bid, in a rare bidding war between two groups linked to Singapore state investor Temasek.

Keppel offered S$2.351 per share nL4N2S700T, or $2.8 billion. The two groups are vying for control of SPH's global portfolio of property assets, student accommodation and elderly care homes.

Cuscaden - a consortium of billionaire property tycoon Ong Beng Seng's Hotel Properties and two independently managed portfolio companies of Temasek - will need SPH shareholders to first vote against Keppel's offer at a meeting next month, before a second vote later in favour of its own bid.

"We would be definitely be reaching out to shareholders," Christopher Lim, Hotel Properties' group executive director and representative of the consortium said on Tuesday.

SPH and Cuscaden have also entered into an implementation agreement and SPH's independent directors have preliminarily recommended the deal to shareholders.

It's "unprecedented" that SPH shareholders will get to vote first on Keppel's "inferior" bid, said Lim. He pointed to paid advertisements and social media as platforms Cuscaden would use to get the consortium's message to shareholders.

SPH shares closed 1.7% higher at S$2.37.

Keppel on Tuesday said it has already obtained regulatory approvals and its offer has a quicker path for the deal to be completed.

($1 = 1.3538 Singapore dollars) (Reporting by Nikhil Kurian Nainan and Anshuman Daga; Additional reporting by Sameer Manekar in Bengaluru; Editing by Emelia Sithole-Matarise)