Malicious PDF — malware analysis report

Static analysis result for SHA-256 defaff9be3f10ad9…

MALICIOUS

PDF

79.4 KB
MD5: b3116317615136dda0021cd7153a18ea SHA-1: 7ddf178f478c84d40cf0e11a0540e40f81f61927 SHA-256: defaff9be3f10ad9a9760abf64b2353feecca719e390d9b9081510da8681350d
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The file is identified as a malicious PDF by multiple high-confidence heuristics, including a ClamAV detection and an ML classifier. The presence of an XFA form and an embedded script payload indicates an exploit attempt. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by obfuscation. The benign reputation of the Adobe XDP URL suggests it is not the primary malicious indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000023c.bin
baf31156be70ca2e097d199121dcb567905731237f6acdd68ea4f75c0ebb4463		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80624 bytes

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