Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 390e816ee90489df…

MALICIOUS

RTF / .DOC

24.4 KB First seen: 2023-07-27
MD5: 2d691029ea7c7963db78038eab462842 SHA-1: f2946101d6055e364632577c2937bb588373c137 SHA-256: 390e816ee90489df6ad5b3e49d9940d9f2d2b2e4d2dca4469c07246ca09d7bf4
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF document contains OLE object data and an \objupdate directive, indicating an attempt to automatically activate embedded objects. This is a common technique for delivering malicious payloads, often disguised as legitimate documents. While no specific malware family is identified, the method strongly suggests a downloader or initial access vector.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000018c2.bin
ad741a3c0432fb0413a99dc6b8e5ea947828d5e8c7c8c79ccf7ed3ff38e19256
rtf-objdata-decoded RTF \objdata at offset 0x18C2 3671 bytes