Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a93949bb17fd4bac…

MALICIOUS

RTF / .DOC

4.7 KB First seen: 2023-01-06
MD5: 572190d08b5b0ad6e71d7fdf6caab304 SHA-1: 629b66bdf917caa418fa563cd3507143c50986a6 SHA-256: a93949bb17fd4bac65a948cad3f0560c2af768494bcad86c0aae0628b17cceaf
80 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 an OLE object, which is a common technique for embedding malicious content. The heuristic SE_ENABLE_LURE indicates that the document explicitly instructs the user to enable editing and macros, a typical social engineering tactic to bypass security measures. This strongly suggests the document is designed as a lure to download and execute a secondary payload.

Heuristics 3

  • \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_off000005f5.bin
43fec44dc8c0010b3100e4441882f76fafed246166d46ca6b3224b2193726aa5
rtf-objdata-decoded RTF \objdata at offset 0x5F5 1605 bytes