Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bffaabac4ce14b4…

MALICIOUS

PDF

99.6 KB
MD5: 7633ca7d171809f26b4e34a1a65618a1 SHA-1: 05657b3edfc31f4759c3f4e395d34fbea09910cc SHA-256: 8bffaabac4ce14b4fb907e4629d19a3f0c7aa893f61b562dfd936603c46d0e15
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The critical heuristic firing indicates the exploitation of this known vulnerability. The PDF contains embedded script payloads within its XFA form, suggesting it's designed to download and execute a second-stage payload. The embedded URLs are likely related to the XFA functionality but could also be used for C2 communication or payload retrieval.

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.
  • 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
1bed43bd8cd957b63937524d07051c885add087afc09828276d3989869bb03ad		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101242 bytes

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