Malicious RTF — malware analysis report

Static analysis result for SHA-256 5401c0935b28494f…

MALICIOUS

RTF

2.12 MB Created: 2019-09-17 13:59:00 First seen: 2020-06-01
MD5: f26aeaf30c466f9c200f994a4f0259af SHA-1: 5f2cb191c11d2335fa9b253106a78cf9ce38b1be SHA-256: 5401c0935b28494fee829cbfd58fd054c93bf5ba4f6ff2e3ece28fd59160beef
82 Risk Score

Malware Insights

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

The RTF file contains embedded OLE objects that are activated via an \objupdate directive, indicating an attempt to exploit a vulnerability for code execution. While no specific script was extracted, the presence of embedded OLE objects and the RTF format strongly suggests a malicious document designed to be delivered via spearphishing. The embedded URL is benign.

Heuristics 4

  • \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/2{ In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00217045.bin rtf-objdata-decoded RTF \objdata at offset 0x217045 1413 bytes
SHA-256: b5b6e8f1ae18e3b541dc347b6d8c8af04c416442ccc6419839210a85393e359c

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