Rtf.Dropper.Agent-7660286-0 — RTF malware analysis

Static analysis result for SHA-256 39c63b4a91f493cb…

MALICIOUS

RTF

455.5 KB Created: 2019-09-17 13:59:00 First seen: 2020-06-01
MD5: 49b742716984c06b4940c4dcc956e273 SHA-1: 9460f4609e69e1fed0efc578ce0513f56c29bceb SHA-256: 39c63b4a91f493cb26dd2844ccfd5ea7ac05b84cf2028fde963700289987687f
202 Risk Score

Malware Insights

Rtf.Dropper.Agent-7660286-0 · confidence 95%

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

The RTF file contains an embedded OLE object that is configured to update automatically, triggering the exploitation of CVE-2017-8759. This technique is commonly used by droppers to download and execute additional malicious content. The ClamAV detection name 'Rtf.Dropper.Agent-7660286-0' further supports this assessment.

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-7660286-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7660286-0
  • \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_off0006f4e2.bin rtf-objdata-decoded RTF \objdata at offset 0x6F4E2 1413 bytes
SHA-256: 72212c5803c421c92ebf783829120ca39ce8de42211fcb18bb2d9d1e8cef5c89

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