Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 57948e7394fc0b3d…

MALICIOUS

RTF / .DOC

633.7 KB
MD5: b071e9f792e0d5fa0ae0fe04680986e4 SHA-1: 73d124380fdd8cea54dce26097f00698db893a7d SHA-256: 57948e7394fc0b3da61e663104053cf08ce8ac8a150c9b4d242bdfb072d00e1a
129 Risk Score

Malware Insights

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

The RTF document contains OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this embedded object is designed to be activated, likely leading to the execution of the payload within objdata_00_off00001d13.bin. The document body is heavily obfuscated and unreadable, providing no direct clues to the lure, but the technical indicators point to a malicious OLE object execution.

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_off00001d13.bin
20957d5a7e2afd3aed6d7749bad2ac154d26d34c891a923e2172f05f3f7789f6
rtf-objdata-decoded RTF \objdata at offset 0x1D13 128571 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.