Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 4a26dff65e300d20…

MALICIOUS

Office (OLE) / .DOC

322.0 KB Created: 2021-09-16 09:41:00
MD5: 54e10706f4addece0dc3219088103795 SHA-1: b828e6fcfe836bccdc6f254c5c53a7c920252c62 SHA-256: 4a26dff65e300d20cc94e13eb235cd3e34d5738808c56a42c611b0f4f8764068
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The sample is a malicious DOC file containing VBA macros. The Document_Open macro is triggered upon opening the document, and it appears to attempt to create a new document named 'reform.doc' with the password '2281337' in the user's template path. The macro also contains logic to search for files and potentially copy content, suggesting a downloader or information-stealing precursor. The exact payload or final intent is obscured by truncation and obfuscation within the script.

Heuristics 5

  • Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT
    OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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.
  • 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/2006/encryption
    • http://schemas.microsoft.com/office/2006/keyEncryptor/password
    • http://schemas.microsoft.com/office/2006/keyEncryptor/certificate
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c5eb4757ddca02546c29b8bb7ebe1e28259400c86649771c5092c092ea3df037		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2971 bytes
ole10native_00.bin
1301ad2f56cb05e2e1d6e9246ec99a39f774b5cfe88be5d724e731284ad0b934		 ole-package OLE Ole10Native stream: ObjectPool/_1693260807/Ole10Native 156481 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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