Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa37a3971b653988…

MALICIOUS

PDF

12.7 KB
MD5: 57ecd1ddf788c4fce64a618cb30fccb8 SHA-1: 49bedf294c7f82b20cdcd7fb4383969e9b4ed5aa SHA-256: aa37a3971b6539885c8ae7dc33ed8319d323c4126f943e896d172d0d9847c9ea
188 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains an XFA form with an embedded script, which is being exploited via CVE-2010-0188 in Adobe Reader. This exploit allows for arbitrary code execution. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact functionality is obscured by the exploit itself. The presence of an embedded URL further supports the malicious intent.

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
9cf0a17ae236cc6aca7ff3c9334eaf1b8a94a45446b58d8f567c520318d3dc20		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12311 bytes

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