Observations, not findings. Every construct below appears in ordinary, legitimate plugins — they are listed so you can judge for yourself. Only ClamAV decides this package's verdict.
preg_replace /e
The /e modifier executed the replacement as code
Code execution24
eval (JavaScript)
Executes a string as code
Code execution18
shell_exec
Runs an operating-system command
System command8
new Function()
Builds a function from a string
Code execution4
Referenced hosts
20 distinct
Domains appearing in the package source. Most are documentation links or CDNs; their presence is not evidence the package contacts them.