Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 cb1752f4c3ce4eb9…

MALICIOUS

RTF / .DOC

256.9 KB
MD5: 61ad1888713776ac70b093f24b5699b3 SHA-1: e5e1737cb0606b10b922c5cac18c5b0e9c8fa6d3 SHA-256: cb1752f4c3ce4eb92fabfcda425087e7c5cb4cb771556a88e4840cff015ba649
129 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The RTF document contains an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, which is a common technique for exploiting vulnerabilities in applications that process OLE objects, such as Microsoft Office. The extracted artifact 'objdata_00_off00001ae7.bin' is likely the payload or exploit code. The high entropy of this artifact further suggests it may be packed or obfuscated. The overall attack pattern points towards a malicious document designed to exploit a vulnerability and likely download further malicious content.

Heuristics 3

  • \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_off00001ae7.bin
8ab2b566dc0ca6db0e4357164d4c97bc3af4ffbb5ba92eee928fa09b9665bed8
rtf-objdata-decoded RTF \objdata at offset 0x1AE7 64065 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.94, consistent with packed or encrypted content.