Malicious RTF — malware analysis report

Static analysis result for SHA-256 4dbd1e79f4626772…

MALICIOUS

RTF

8.2 KB First seen: 2020-07-02
MD5: 1d325c2f76ee3ccdd3182af474f62056 SHA-1: c965b340fa35d1e54d5fb96eef944be2674b7678 SHA-256: 4dbd1e79f462677241bc830bdad286922182c53dcde070a392dbe8b96ab1a0a6
60 Risk Score

Malware Insights

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

The RTF file contains an OLE object with the \objupdate directive, indicating an attempt to exploit a client-side vulnerability for execution. The presence of OLE object data further supports this. Without a document body or script content, the exact payload and delivery mechanism remain unclear, but the technique strongly suggests a malicious document intended to compromise the user upon opening.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001199.bin rtf-objdata-decoded RTF \objdata at offset 0x1199 1701 bytes
SHA-256: 77f98cb3fc103ed859d7c694069626e62decf604121214ff484b0934c0bb162d

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