Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 08478b7204b635bd…

MALICIOUS

RTF / .DOC

163.5 KB
MD5: e028ee00a459708098fdec4ce7c603f0 SHA-1: 721b93c82c9d499ead613c2d654ed90bd386aa5a SHA-256: 08478b7204b635bd04478b96f192d8f47a0ebb4f1a1f0e8033e7ffaf26205ccd
102 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 \objupdate to force activation, indicating an attempt to execute embedded content. The high entropy of the carved artifact suggests it is likely a packed or obfuscated payload. While no specific script was extracted, the overall structure points to a malicious document designed to exploit OLE vulnerabilities for initial execution, commonly seen in spearphishing attachments.

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 1 \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_off00001bf0.bin
663284053f2fc0d50d001011102b25b94c55b92f23dd6da90d2db1de6494d741
rtf-objdata-decoded RTF \objdata at offset 0x1BF0 64057 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.94, consistent with packed or encrypted content.