Rtf.Dropper.Agent-7660350-0 — RTF malware analysis

Static analysis result for SHA-256 a46bd6e8195bcfd6…

MALICIOUS

RTF

1.23 MB Created: 2019-09-17 13:59:00 First seen: 2020-05-25
MD5: 83251afa4f7f34b8e1734e7e8b488ca1 SHA-1: 844f2045a713964ff53d95e6b4a52fc0fc2e5a73 SHA-256: a46bd6e8195bcfd6375a30180dc47bf70c31230f3159e6c63bbbd90bf57eef32
202 Risk Score

Malware Insights

Rtf.Dropper.Agent-7660350-0 · confidence 95%

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

The RTF file contains an embedded OLE object that is activated via \objupdate, exploiting CVE-2017-8759. This indicates the file is a dropper designed to execute a secondary payload. ClamAV detection confirms this as Rtf.Dropper.Agent-7660350-0.

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-7660350-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7660350-0
  • \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_off00125c9f.bin rtf-objdata-decoded RTF \objdata at offset 0x125C9F 1413 bytes
SHA-256: 9306d52147f38b3427afe917115f159fa82c0a77ef499a1d722d6d260468efbb

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