Malicious PDF — malware analysis report

Static analysis result for SHA-256 224c5dc5be89481c…

MALICIOUS

PDF

16.3 KB
MD5: b81358b38c709fdb9f494b350eb45df8 SHA-1: 425fa2efbeb617957eff9b6dae1c054bdc149e1f SHA-256: 224c5dc5be89481cac65fa3af430dcf524ea50566b0d1ec1ec5822b52c5172f5
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The sample is a PDF file that leverages the CVE-2010-0188 vulnerability, a known exploit targeting Adobe Reader's XFA forms. The heuristic firings indicate the presence of an embedded script payload within an XFA form, which is characteristic of exploit delivery. The embedded URL, while seemingly benign, is present within the document's structure, suggesting it may be part of the exploit chain or a lure.

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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
90c9f4727a9248f709afdead02e9f42e2bf48a15428ee4078539fd25f2e07744		 pdf-embedded-script PDF raw stream script payload at offset 0x359 15942 bytes

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