Troj/Cacher-A is a Trojan that attempts to execute further malicious code.
The Trojan searches for files with the following filenames:
2005528165337645[1].jpg
2005528165337645[2].jpg
If either file is found and has a filesize 103,855 bytes it is copied to <Temp>\pakins.exe and run.
The Trojan may delete the file C:\winxp.hta. This may be another malicious file.