Malicious PDF — malware analysis report

Static analysis result for SHA-256 10222d17c5eee1e5…

MALICIOUS

PDF

82.6 KB
MD5: c7dd6e1a7e09a6b668dcffafe82d54e5 SHA-1: f5e9b9fdfa29e5d49542076b6800e34550eecaf8 SHA-256: 10222d17c5eee1e5cd538109b5b2f4a2b505dc6653301b5411b42d7f3af6dfe8
168 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of an exploit. The embedded JavaScript, although obfuscated, is designed to execute code, likely to download and run a second-stage payload. The presence of XFA form elements and embedded scripts points towards an exploit targeting PDF viewer vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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_00000246.bin
663c28689be55beeab5ea270a9e6fa7a8a85bad59f27ae9642d575165c13faac		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83835 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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