Malicious PDF — malware analysis report

Static analysis result for SHA-256 61682e1845517aee…

MALICIOUS

PDF

97.3 KB
MD5: c948793b309b4e6774e57bfaf0143e7c SHA-1: be64c1af514702c4a9643456a4bc0491b91e85a5 SHA-256: 61682e1845517aee389f1d0a15eedc1c6b9ee5030febdea0b1fae9aedfc07f0b
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, containing an embedded XFA form and script payload. The embedded JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The benign URLs present are likely decoys or standard XFA schema references.

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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low 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.
  • 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_0000026c.bin
11bab053891eb470834511fc44e87d4a459f3e6c00066b98f4c0430b54f20757		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98867 bytes

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