Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 31effdb379273a91…

MALICIOUS

RTF / .DOC

455.6 KB
MD5: 1055bc87cb58e2fb140905caf417b32d SHA-1: adf0f639db70ceca0a7576e2da39ad462e68c8c8 SHA-256: 31effdb379273a91714a42408079b883e0b15c4cf234fce06197e50e78817a9a
82 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects, and a ".objupdate" directive forces OLE activation, indicating an attempt to exploit object handling vulnerabilities. A suspicious artifact was carved from the object data, suggesting the execution of arbitrary code. The exact payload and delivery mechanism are unclear due to the lack of document body text and obfuscated script content.

Heuristics 4

  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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_off00000c2f.bin
acc414f0d9cc72d3bbc25e15f5602aa0acdb17c3545234d38c927dcd65765141
rtf-objdata-decoded RTF \objdata at offset 0xC2F 231655 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.