Malicious PDF — malware analysis report

Static analysis result for SHA-256 665e71b5336966e0…

MALICIOUS

PDF

50.8 KB
MD5: 24192990c7cc3dd2b5e0133332e72f7c SHA-1: 4c322e249d934613d16d73b97be9baa1516c39a3 SHA-256: 665e71b5336966e040492d06a41dab18b501fe23e215a321a3499f814df33602
176 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically targeting CVE-2010-0188 in Adobe Reader's XFA forms. The embedded script payload and the ClamAV detection signature 'Pdf.Exploit.Agent-6136306-0' indicate that the exploit is designed to download and execute a secondary stage. The benign URLs found are related to XFA schema definitions and do not appear to be malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
3799049d73113bda184de876d8ba274b126733612a567a7978bb3fd16605c6a4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51239 bytes

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