Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 08f0e5bd55cd19c8…

MALICIOUS

RTF / .DOC

499.1 KB
MD5: fd0225b6b4e5e14dd09ce9323d198ea2 SHA-1: fd9d35bffd580da6e2b6ddebb1e34998e97487a9 SHA-256: 08f0e5bd55cd19c8a64acda400b23e9e8fbd12dedc35d1ccef58ecd8200ba5a0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The RTF document contains OLE objects with ` extobjdata` and ` extobjupdate` sections, indicating embedded objects that are likely to be executed upon opening. The high entropy of the decoded OLE object suggests obfuscated or packed content, potentially a second-stage payload. The document body is unreadable, providing no further context on the lure.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000006a2.bin
54c44f6c76746fb6eceb614dce02f2bfe2adf48155ee465e447ccd773d70fddd
rtf-objdata-decoded RTF \objdata at offset 0x6A2 145464 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.