Amount of unsolicited correspondence in email (spam) traffic increased by 0.53% points and averaged 66.55% in the first quarter of 2013, according to a report from the Kaspersky Lab.
During the quarter, the share of emails with malicious attachments reached 3.3%, whereas the share of phishing emails decreased by 4.25 times to 0.0004%.
According to the Lab, spammers reintroduced the white text method to create background noise in the emails, which are expected to be viewed by the spam filters as newsletters, as the random news fragments make it difficult to detect.
Kaspersky Lab senior spam analyst Tatyana Shcherbakova said that in the first quarter 2013, the percentage of unsolicited correspondence in mail traffic varied from month to month though the average figure remained unchanged from the previous quarter.
"We expect the share of spam to remain at its present level in the future or grow slightly due to the recent increase in the number of multimillion mass mailings," Shcherbakova said.
China occupied the first place in the list of the most active spam distributors with 24.3% share, followed by the US with 17.7% share, while South Korea was third with 9.6% share the total spam.
