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Moreover , as users collaborate and share through cloud services , these malicious files posing as PDFs “ fan out ” to shared users , creating a secondary propagation vector .
 these malicious files: tool; creating a secondary propagation vector: attack pattern; users: victim; shared users: victim; PDFs: trusted entity; share through cloud services: attack pattern
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phishing 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, trusted entity 
Text: {0} 
Answer:
 these malicious files: tool; creating a secondary propagation vector: attack pattern; users: victim; shared users: victim; PDFs: trusted entity; share through cloud services: attack pattern