Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 6986498bb03c9044…

MALICIOUS

RTF / .DOC

9.4 KB First seen: 2022-07-21
MD5: 9b0b587a53a408bcfc9369e1119ee451 SHA-1: ef432e3b0d7df82d1c729dfc2937b9ee59c0f49c SHA-256: 6986498bb03c9044c5607bde71b3c498855212c38272c62dc359418df0bc1e53
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF document contains OLE object data and uses an \objupdate directive, indicating it's designed to exploit vulnerabilities or execute embedded content. The heuristic 'SE_ENABLE_LURE' confirms the document instructs the user to enable editing, a common social engineering tactic to bypass security measures. While no scripts were extracted, the presence of OLE objects and the lure suggest the file is a dropper for a second-stage 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 2 \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_off00001184.bin
ec0738a8f3da4a6b5433d3dfaf432a6ff96ff313ee3c20ebf00c0ad4dd8333ce
rtf-objdata-decoded RTF \objdata at offset 0x1184 1554 bytes