Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3f709d63b83cd691…

MALICIOUS

RTF / .DOC

576.6 KB
MD5: 42ed017db954bac63854e4c39b5863f6 SHA-1: a72e36598934af5c2ddb5c276542eb7a6b3af50c SHA-256: 3f709d63b83cd6917c2cba1cdb8b1bf999b772d70e3c96340255b38d1f8fac74
166 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects, indicated by RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be activated, likely leading to the execution of malicious code. The high entropy of the extracted artifact further supports the presence of packed or encrypted malicious content. The primary attack vector appears to be leveraging OLE object vulnerabilities for arbitrary code execution.

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_off00001ae3.bin
b4d87a60a4ecf6fa036498697ce44f6e40e994f649492c37b8066890755820fa
rtf-objdata-decoded RTF \objdata at offset 0x1AE3 145972 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.