Office (OOXML) malware analysis — malicious · ca70f4e1d2308ca2

MALICIOUS

Office (OOXML)

63.6 KB Created: 2021-02-22 21:27:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2021-03-01

MD5: 28fedb706bbf4b5018d8fb55e1ae7f50 SHA-1: 457329a90bff8e902f4cc3600f76e8f485f12fcd SHA-256: ca70f4e1d2308ca2e007dbe44f8f977d3ddba10901c1d99f2f032acb25006dc7

222 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample is an Office document containing an embedded OLE object. This object is identified as a risky file that drops an auto-executable payload named 'payment receipt.pif'. ClamAV detections confirm the presence of malware, specifically 'Win.Trojan.Midie-9835307-0', on both the main file and the extracted artifact. The primary attack pattern involves tricking a user into opening the document, which then executes the embedded malicious file.

Heuristics 5

ClamAV: Win.Trojan.Midie-9835307-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Midie-9835307-0
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.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object
Suspicious extracted artifact medium 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/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	139264 bytes
SHA-256: `4602fd39120a1444ff19907c9b58833303f4fee3e2e80b31c59903e7f77e29bc`
Detection ClamAV: Win.Trojan.Midie-9835307-0 Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: NOP sled
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	135543 bytes
SHA-256: `7536a0f7a763feec6fccba95ed6ebad79775d4546d10d71da126a8e081d34ca6`
Detection ClamAV: Win.Trojan.Midie-9835307-0 Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: NOP sled
`ooxml_oleobject_00_ole10native_00_payment_receipt.pif`	ole-package-payload	OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=payment receipt.pif; full_path=C:\Users\anijo\AppData\Local\Temp\payment receipt.pif; temp_path=; def_file=	135168 bytes
SHA-256: `caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4`
Detection ClamAV: Win.Trojan.Midie-9835307-0 Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: NOP sled
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image1.emf	5632 bytes
SHA-256: `f273a76c072ecb63e4813e1082b7f376c748a26badee0b3b1c43c30c269dfcdf`

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