Hello,
Trojan.Maljava is a detection name used by Symantec to identify malicious Java files that exploit one or more vulnerabilities.
http://www.symantec.com/security_response/writeup.jsp?docid=2010-102003-2856-99
These files may have been detected probably due to the Low reputation on Files.
Secondly, Trojan.Maljava is a detection name used by Symantec to identify malicious Java files that exploit one or more vulnerabilities.
SONAR is the real-time protection that detects potentially malicious applications when they run on your computers. SONAR uses heuristics as well as reputation data to detect emerging and unknown threats. SONAR provides "zero-day" protection because it detects threats before traditional virus and spyware detection definitions have been created to address the threats.
Understanding Heuristics:
http://www.symantec.com/avcenter/reference/heuristc.pdf
This is likely a legitimate detection based upon the settings you have set for the Sonar component. To confirm whether or not what you are seeing is intended or unintended please review the SONAR logs.
Monitors->Logs->Log Type: SONAR->Set an appropriate Time Range->View Log
Review the details for the detection that occurred to determine if the action taken was appropriate.
Review your settings for SONAR here once you have checked out the log for the detection:
Policies->Edit Virus and Spyware Protection Policy->Protection Technology: SONAR->System Change Events.
Handling and preventing SONAR false positive detections
http://www.symantec.com/docs/HOWTO55273
Hope that helps!!