Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 e66571b81b0ef836…

MALICIOUS

RTF / .DOC

348.0 KB
MD5: 59e5b33cb60843305dd2b9744ff0a105 SHA-1: a0e414d9eb3c99389f5a7760590c182f3e5501ef SHA-256: e66571b81b0ef8369af0c7dacf1fe0a1029f3084bcbdebccb6df63a379755dfa
147 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains embedded OLE objects that are automatically linked and updated, indicating an attempt to exploit OLE vulnerabilities or trick the user into activating embedded content. The heuristic firings strongly suggest the presence and activation of OLE objects within the RTF structure. While no specific script or document body content was available for analysis, the OLE object activation is a common technique for delivering malicious payloads.

Heuristics 4

  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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_off00000f61.bin
672de1c581e6baa5106dc27757af2da8eab8b09d7212a078ef9d5fd1868cab71
rtf-objdata-decoded RTF \objdata at offset 0xF61 64051 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.