Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b136291a17e064dd…

MALICIOUS

RTF / .DOC

896.0 KB
MD5: 138ab57f963695072c50dd6cbf5a2050 SHA-1: 83cf0888f144cd5dcc66b823689b093d06785856 SHA-256: b136291a17e064dd9d44cc454556980107d96da2a0adb1a31eb2db3531b6832a
62 Risk Score

Malware Insights

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

The RTF document contains an OLE object with an \objupdate directive, indicating an attempt to automatically activate embedded content. This technique is commonly used to exploit vulnerabilities or deliver secondary payloads. While no specific exploit or payload was directly identified, the presence of these indicators strongly suggests a malicious intent to execute code upon opening.

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_off00000066.bin
f3456cda382f329c0114f10635c959ed12a1fce40ecbf2133fc5d0593e469ad8
rtf-objdata-decoded RTF \objdata at offset 0x66 458649 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.