Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 d83108a5bd1b367a…

MALICIOUS

RTF / .DOC

182.6 KB First seen: 2022-10-12
MD5: 19b489ee861af25c7ba249915664e5e6 SHA-1: 4decf91ed3760e4ae05ec6ed366a38c2d1894097 SHA-256: d83108a5bd1b367a6d814d8b8c4b814af156f3e1b58113ba05a87d5d6efecac6
80 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating an attempt to embed and activate external content. The document body explicitly instructs the user to 'Enable editing' due to it being created in an 'earlier version microsoft office word', a common lure to bypass macro security. This suggests the file is designed to exploit user interaction to execute malicious code.

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_off00000fba.bin
9fef96a74ca2ea28ce57396a2dde83771018b109c410c6d0d6334088efd11d33
rtf-objdata-decoded RTF \objdata at offset 0xFBA 1543 bytes