Malicious RTF — malware analysis report

Static analysis result for SHA-256 cf7df6863ec2d98c…

MALICIOUS

RTF

24.5 KB
MD5: 088e80a24debb252fdf1355384bfab8e SHA-1: e659b18c190a802062e58a6af01b675f3a9a2518 SHA-256: cf7df6863ec2d98c6ebf48de6219956d012bb2a6dd1af9eb9502ffecd7c75b72
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 embedded OLE objects, indicated by RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be automatically activated upon opening the document. This mechanism is commonly used to download and execute a second-stage payload, although no specific download URL or payload hash was extracted from this sample. The truncated document body does not provide further context on the lure.

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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001559.bin
8fa37ba059cb15103c71205c59ae35706e3faa2f97f65debfbb6291116b10ac3
rtf-objdata-decoded RTF \objdata at offset 0x1559 4201 bytes