Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9d825c5e6cdff6bd…

MALICIOUS

Office (OLE)

45.5 KB Created: 2004-02-18 08:48:00 Authoring application: Microsoft Word 8.0
MD5: d1b209b19cca5a14659b15cecfd87d60 SHA-1: 79b184ca1839d942844f52e1b7bc1fab1bfe9823 SHA-256: 9d825c5e6cdff6bd6c6204e5d1cbaf2e2902d568bfacecb6c12d0b372a8838ee
260 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Saver-2. It contains VBA macros, including AutoOpen and Auto_Close, which are commonly used to execute malicious code upon opening or closing a document. The document body presents a plausible lure related to a Ukrainian management association, likely to encourage the user to interact with the malicious content. No specific IOCs beyond the ClamAV signature were extracted.

Heuristics 6

  • ClamAV: Doc.Trojan.Saver-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Saver-2
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 46,592 bytes but its declared streams total only 26,674 bytes — 19,918 bytes (43%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f2755f6f4c9b2c2d2680c3168ef27347b26e94e11a0c377710313fb0be7b74cd		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2290 bytes
Detection
ClamAV: Doc.Trojan.Saver-2
Obfuscation or payload: unlikely

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