Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9bf40f1af41880…

MALICIOUS

PDF

50.8 KB
MD5: 40edf9806d835233d3a6e9075765e0b6 SHA-1: 03fb670e00d7c748f346bd02708bfb50bdda5654 SHA-256: 4f9bf40f1af4188055cf0e3590db5bf722be16854f10c1bbd413812e172989b7
196 Risk Score

Malware Insights

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

The PDF file contains critical heuristic firings indicating an exploit for CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The presence of embedded script payloads within the XFA form further supports the malicious nature of the document. The embedded file and ClamAV detection confirm this is a malicious PDF designed to exploit users through a known vulnerability.

Heuristics 7

  • 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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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.
  • 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 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
1a34aa201e5021760714e44d73c6866fac63259b7730b85ff45d9e8d3b443ff2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51295 bytes

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