Win.Trojan.MDMA-4 Office (OLE) malware analysis — malicious · 7606d1e43319ced8

MALICIOUS

Office (OLE)

14.0 KB Created: 1980-01-04 18:58:00 Authoring application: Microsoft Word 6.0 First seen: 2012-06-14

MD5: aa661b0b61d90bbd97ad36a22a401bbd SHA-1: 89cd214300c143664d62adda0c70273eb17e3be2 SHA-256: 7606d1e43319ced8b5ccd75621809250adea57b83723ebed8884de0a337308ab

220 Risk Score

Malware Insights

Win.Trojan.MDMA-4 · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic

The sample is identified as malicious by ClamAV with the signature Win.Trojan.MDMA-4. Static analysis detected a legacy WordBasic AutoClose macro, indicating an attempt to execute code upon document closure. The embedded artifact also shows suspicious findings related to OLE parsing, further supporting malicious intent.

Heuristics 4

ClamAV: Win.Trojan.MDMA-4 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.MDMA-4
Embedded Office document has suspicious static findings critical EMBEDDED_OFFICE_CHILD_STATIC_TRIAGE

A CFB/OLE Office document was found inside another file type and its carved contents matched Office exploit or payload heuristics. This catches wrapped exploit documents where the top-level file routes to a PE, archive, or generic scanner instead of Office.
Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC

OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
CFB header with no readable streams medium OLE_PARSE_EMPTY_STREAMS

The file begins with a valid OLE2/CFB header but exposes no directory streams. A non-empty compound document with an unreadable directory is anomalous — it is seen with truncated/corrupt files and, more importantly, with content deliberately shifted off byte boundaries to defeat parsers while the host application still recovers the object.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_off0000227b.ole`	embedded-office	Embedded OLE/CFB Office body inside ole container at offset 0x227B	5509 bytes
SHA-256: `b1bfe2c43f81f5477e0101fa5067eafba3288df95f8e3a799c9e00f1b81e5cb4`
Detection ClamAV: Win.Trojan.MDMA-4 Obfuscation or payload: unlikely

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