Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3167df0bcb2fb4ad…

MALICIOUS

RTF / .DOC

1.18 MB Created: 2019-09-17 13:59:00
MD5: 53fd40d7b5cca4f95ec5675d6d045f02 SHA-1: 8a06c43abc84ba400557988f844b915c50f5355c SHA-256: 3167df0bcb2fb4ad40d09cf95c2f9756a6e2d04b68881839b14615bd5940ce82
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter T1566 Phishing

The sample is an RTF document containing embedded OLE objects, with heuristics indicating the exploitation of CVE-2017-8759. This vulnerability allows for OLE activation, which is likely used to download and execute a secondary payload. The presence of 'SE_PASSWORD_ARCHIVE_LURE' suggests a social engineering tactic to trick the user into handling encrypted archives, further indicating a malicious delivery mechanism.

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.
  • \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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00128c65.bin
fb4bb8b6e1ff6184ee1ec0ff55862ebacc36f75473b0e9a244da32b695ea9485		 rtf-objdata-decoded RTF \objdata at offset 0x128C65 1485 bytes

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