Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 db0a6d8aa87ae846…

MALICIOUS

Office (OLE)

74.5 KB Created: 2010-04-28 18:16:00 Authoring application: Microsoft Word 10.1
MD5: 7372ebd5fc0acbdb82c81b46c22e132d SHA-1: 8d45637476531e60c037cdc1ac9c7b9521d296b4 SHA-256: db0a6d8aa87ae846e1b45925e9f5684ed5badea9ec3a2408fd112cbc88015f7f
300 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is identified as malicious by ClamAV with multiple signatures, including Win.Trojan.Psycho-3 and Doc.Trojan.Melissa-4. High-severity heuristics indicate the presence of VBA macros, specifically a Document_Open auto-execution macro that utilizes CreateObject. This suggests the macro is designed to download and execute a secondary payload. No specific malware family could be confidently identified, and the document body content appears benign and unrelated to the malicious functionality.

Heuristics 8

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://www.apple.com/DTDs/PropertyList-1.0.dtd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d9b96e160d2fe61179057ebb96007cd4ea143b1f23dacc45a5bbb02fc859b67d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3743 bytes
Detection
ClamAV: Doc.Trojan.Melissa-4
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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