PDF malware analysis — malicious · 28992bd81835d12f

MALICIOUS

PDF

37.1 KB

MD5: b27bc0241f32ae1f3261dbcb3776e83a SHA-1: 0ea80616e54bf81ab4e59f61c0d27a63fcdd85e4 SHA-256: 28992bd81835d12f1b1593f2c04ae1115e8c8bcf103267df1fa10c4ecbdad25c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains an XFA form and an embedded script payload, which is flagged by multiple heuristics and ClamAV as malicious. The ML classifier also strongly indicates maliciousness. The embedded script is likely responsible for delivering the exploit, as indicated by the ClamAV detection name 'Pdf.Exploit.Agent-6136306-0'.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

Heuristics 5

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0000026c.bin` `d9c8d05bc868572936d60cf1282d72b9e8e2ce4c9afa2965511ec46a30f14153`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x26C	38006 bytes
Detection ClamAV: Pdf.Exploit.Agent-6136306-0 Obfuscation or payload: unlikely

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