Office (OLE) malware analysis — malicious · c39e6d5b063ffece

MALICIOUS

Office (OLE)

222.0 KB Created: 2017-11-02 05:47:00 Authoring application: Microsoft Office Word First seen: 2017-11-20

MD5: ab3b67cc0c0d24c1496643ce763398d1 SHA-1: a72ab24870fbfd25e04569a30a1c1f9e6c6a991a SHA-256: c39e6d5b063ffece92a95d778e9a3ddbe4d238418250d9e2c5b1902a26c2ad12

562 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a Microsoft Word document that exploits CVE-2007-3899, a memory corruption vulnerability, to execute code. It contains an embedded OLE package that acts as a dropper, downloading and executing a PE executable from the provided URLs. The embedded executable was detected by ClamAV as Win.Packed.Razy-6849099-0.

Heuristics 11

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.
ClamAV: Win.Packed.Razy-6849099-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Packed.Razy-6849099-0
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
Ole10Native package payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER

The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
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 CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
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
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.smartassembly.com/webservices/UploadReportLogin/L Embedded OLE package script
- http://www.smartassembly.com/webservices/UploadReportLogin/GetServerURLEmbedded OLE package script
- http://www.smartassembly.com/webservices/Reporting/EEmbedded OLE package script
- http://www.smartassembly.com/webservices/Reporting/UploadReport2Embedded OLE package script

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_000034b2.exe`	embedded-pe	Office MZ+PE at offset 0x34B2	213838 bytes
SHA-256: `8685798f8d991c493972df55b352aaf0f3200a3181f21e968252f1760e5bc955`
Detection ClamAV: Win.Packed.Razy-6849099-0 Obfuscation or payload: unlikely
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_1571110429/Ole10Native	209680 bytes
SHA-256: `3776b136dd0c811967f591d16a55317f718a2076ed2759f7c71516391a6577ad`
Detection ClamAV: Win.Packed.Razy-6849099-0 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.