Office (OLE) malware analysis — malicious · 2eb439812c8e3250

MALICIOUS

Office (OLE)

709.7 KB Created: 2011-01-10 06:39:00 Authoring application: Microsoft Office Word First seen: 2017-10-28

MD5: 11185ff2c79c9ddaafbd9c40829c1b0a SHA-1: d7c9a9efbf9162e95a22d2860c9179211fcae78b SHA-256: 2eb439812c8e3250d8983aeb71099465b5a0fd1938b6f6b0ef8a780b5af9669e

384 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This Office document contains an embedded PE executable, identified by the 'OLE_EMBEDDED_EXE' heuristic. The presence of 'ShellExecute', 'LoadLibrary', and 'GetProcAddress' API references, along with specific CVE firings (CVE_2007_3899 and CVE_2026_21514), indicates an attempt to exploit vulnerabilities for code execution. The document also signals a password-protected archive lure, suggesting a method to bypass gateway scanning. The embedded executable is the primary payload.

Heuristics 10

CVE-2007-3899 — Microsoft Word malformed string memory corruption critical CVE likely CVE_2007_3899

Word OLE document has the MS07-060 malformed-string exploit shape: a Word 97-family FIB points to a malformed DOP/string-table region with an abnormal INT_MAX run, inflated text counters, and exploit payload or Mdropper.Z campaign evidence.
OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514

Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd In document text (OLE body)
- http://www.w3.org/1999/xhtmlIn document text (OLE body)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_000046a6.exe`	embedded-pe	Office MZ+PE at offset 0x46A6	708648 bytes
SHA-256: `128ef7813173f9c96412160908bd319b4e78c3215a56c7a3df0a70f0cbc766f9`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.86, consistent with packed or encrypted content.
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_1356248006/Ole10Native	704225 bytes
SHA-256: `a858eb0daa2bbe4c6c7a2a5f3be3426611e064e769cbee27a529fd2b9fcfb574`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.86, consistent with packed or encrypted content.

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