Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5d9afd17b947d2f5…

MALICIOUS

RTF / .DOC

641.5 KB
MD5: c7cdddf35f7ba482ee3e39e0db1c6772 SHA-1: f8ad6fd8789018b8e84e247f5370427ce582efdf SHA-256: 5d9afd17b947d2f50bd9891e79831352dad0acf8600725eab571e2fd92761947
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The RTF document contains embedded OLE objects and uses an \objupdate directive, indicating an attempt to activate embedded content. The document body presents a lure related to financial audits, instructing the user to 'Enable editing' and likely macros, which is a common technique for malware droppers. The presence of OLE objects and the lure strongly suggest the execution of malicious code, likely via VBA macros, to achieve initial execution.

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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000061e5.bin
7b4e3ea2773df35dd2605acf58f512fd84f727da321462e30daf02b8bb8f5b25
rtf-objdata-decoded RTF \objdata at offset 0x61E5 3759 bytes