Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 6cdf6cb265f77f14…

MALICIOUS

RTF / .DOC

56.7 KB First seen: 2023-03-08
MD5: 8d986e6fc6b60c533d5a72dbef674d7a SHA-1: fd798f989afac1afe44fb86cd36a2b9725095d6b SHA-256: 6cdf6cb265f77f14fa56a630f793bacf3e332db8d3ec583930c5f8c06e4ea427
120 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object that is triggered by ".objupdate", indicating an attempt to execute malicious content. The document body uses a financial lure to encourage the user to "Enable editing", which is a common tactic for macro-based malware droppers. No scripts were extracted, and the specific family could not be determined.

Heuristics 4

  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001f46.bin
db62c47ed4e6f87fde5f20cd4c20d27e898b68521b59a39f8d9b813cd153601f
rtf-objdata-decoded RTF \objdata at offset 0x1F46 4159 bytes