Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 efe3deda0b79ab76…

MALICIOUS

RTF / .DOC

502.7 KB
MD5: b3095770e88f1487646972b0ef50c7c4 SHA-1: 733a44eba17c18d50cf96ad4e17b7bd3967bc617 SHA-256: efe3deda0b79ab76891a7a4e077406afc9b10d3b57ba3e972ea6907706ccaf80
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 heuristics. The RTF_OBJUPDATE rule firing suggests that the embedded OLE object is configured to automatically activate upon opening the document. This technique is commonly used to deliver malicious payloads by exploiting vulnerabilities in OLE object handling or by embedding executable content.

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_off00001119.bin
0a354aa9fd9a96a962465200e29b075fbdcc09801358a7928bd44f1c54f1ac61
rtf-objdata-decoded RTF \objdata at offset 0x1119 145978 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.