Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 aabb7d74778bcc4c…

MALICIOUS

RTF / .DOC

1.76 MB Created: 2019-09-17 13:59:00
MD5: 6d87c00c8562c1671f9d8f293e524f0e SHA-1: 50ceec8bc44c07cbc0d6efb60d3df8478d01a2c8 SHA-256: aabb7d74778bcc4cffc431a09e4608eadb3611f63e54173207f99907e7da690c
242 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1559.002 Component Object Model Hijacking

The RTF document contains an embedded OLE object that leverages the Equation Editor, a known vector for exploiting CVE-2017-8759. The presence of ".objdata" and ".objupdate" directives strongly indicates an attempt to trigger OLE activation and execute embedded code. No specific malware family is identifiable from the static analysis alone.

Heuristics 7

  • 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.
  • 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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0019ea4a.bin
7c89b168b67a9265a8af4bd1881602c81a379089da65696aee112f9411401ce1		 rtf-objdata-decoded RTF \objdata at offset 0x19EA4A 3732 bytes

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