Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 866e430bd703647b…

MALICIOUS

RTF / .DOC

648.1 KB
MD5: 5d1ec19251d99c9b2531b660ea3bcda9 SHA-1: e72aaa002c36b6bb6f5f39534579b99625594077 SHA-256: 866e430bd703647bcde1b486e29108820abcf86a3486f91d5c9e6a2672fbe7cc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment

The sample is an RTF document containing OLE object data and instructions to 'enable editing' which is a common lure to bypass macro security. The embedded OLE object is automatically linked and updated, suggesting it's intended to be activated upon opening. The document body discusses financial audits but contains a clear instruction to enable editing, indicating a deceptive social engineering tactic to facilitate malicious execution.

Heuristics 4

  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0001238d.bin
c35e97361f6ddcfd00bf980c2cc9a5314d4f38f2f38cdd6997c34bc8259e6e8f
rtf-objdata-decoded RTF \objdata at offset 0x1238D 3765 bytes