Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 0b4bf2768b8d20fe…

MALICIOUS

RTF / .DOC

162.9 KB
MD5: 1e89b8068fc677f5f477a52ebfaef171 SHA-1: 1a287285269fbe5666289bd4412fcee29c5bd7c3 SHA-256: 0b4bf2768b8d20fe5eb13edb78bb0d77509aae78e0b443623582e9a1ef1e2e56
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 an \objupdate directive, indicating an attempt to embed and activate an OLE object. This is a common technique for delivering malicious payloads. The high entropy of the extracted artifact suggests it may be an executable or packed data. No document body or script content was available for further analysis.

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_off00001906.bin
a5dea3dcdade5e9969a807348f34daaf41d01a15b8766d840cef1a0c12ca645f
rtf-objdata-decoded RTF \objdata at offset 0x1906 64071 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.