According to Norton Antivirus and the jotti malware scanner, this contains a virus.

Scanning Result from virusscan.jotti.org:

File: SillyJassUtil.zip
Status: INFECTED/MALWARE
MD5 cd8e05af360467bb664eb63cd939f3dc
Packers detected: ASPACK

Scanner results
Scan taken on 08 Mar 2007 07:56:06 (GMT)
AntiVir Found W32/Hidrag.a
ArcaVir Found HLL.W32.Jeefo
Avast Found Win32:Hidrag
AVG Antivirus Found Win32/Hidrag.A
BitDefender Found Win32.Jeefo.A
ClamAV Found nothing
Dr.Web Found Win32.HLLP.Jeefo.36352
F-Prot Antivirus Found W32/Jeefo.C
F-Secure Anti-Virus Found Virus.Win32.Hidrag.a
Fortinet Found W32/Jeefo.A
Kaspersky Anti-Virus Found Virus.Win32.Hidrag.a
NOD32 Found Win32/Jeefo.A
Norman Virus Control Found W32/Hidrag.A
Panda Antivirus Found W32/Jeefo.A
VirusBuster Found nothing
VBA32 Found Win32.HLLP.Jeefo

This file should be removed immediately, but I cannot find a report option.