Rtf.Dropper.Agent-8711770-0 — RTF malware analysis

Static analysis result for SHA-256 5e7286a6c92ed2e7…

MALICIOUS

RTF

653.6 KB Created: 2019-09-17 13:59:00 First seen: 2020-07-24
MD5: 333d571e448686dd17da1d47546e4aab SHA-1: 03ddb8e0550dd9e5e01b8560a199ab344b55d744 SHA-256: 5e7286a6c92ed2e7d83789a1e1e71e0e051fa0fbb47ff3767b787c86e1fec49c
202 Risk Score

Malware Insights

Rtf.Dropper.Agent-8711770-0 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is an RTF document that contains an embedded OLE object, which is triggered by \objupdate. The critical heuristic CVE_2017_8759 indicates exploitation of MSXML SAX OLE activation. This suggests the document is designed to execute arbitrary code, likely downloading a second-stage payload. The ClamAV detection name Rtf.Dropper.Agent-8711770-0 further supports this dropper functionality.

Heuristics 6

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Rtf.Dropper.Agent-8711770-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-8711770-0
  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00097fb1.bin rtf-objdata-decoded RTF \objdata at offset 0x97FB1 1414 bytes
SHA-256: 7b58e957efe14bf4a80558c329f645fc0832cdf40acc8e94d32b6530e59b7b1d

Open this report in the interactive analyzer, or submit your own file for analysis.