Malicious RTF — malware analysis report

Static analysis result for SHA-256 d57db8a2a3206521…

MALICIOUS

RTF

651.9 KB
MD5: 4dc79badaef9e46f6955ae5fbe24ac1e SHA-1: 20ff0ced0a661b244b81556b86be9936990e40c2 SHA-256: d57db8a2a3206521c182cf66e6bcd482583740b4db14aebe5cc9b23dfb0f9b1b
62 Risk Score

Malware Insights

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

The RTF document contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to exploit embedded objects. A suspicious object data file was extracted, suggesting the document is designed to deliver a malicious payload via OLE object exploitation. The high risk score and unknown exploit score further support malicious intent.

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_off00000068.bin
01f229723f325a138c2521f4088b4bff15879c9ffc0dc0cb1eb8a1991f777351
rtf-objdata-decoded RTF \objdata at offset 0x68 333682 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.