Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a68ab500570090…

MALICIOUS

PDF

99.7 KB
MD5: 36bc1f0595a963988f63111b9943b708 SHA-1: 5023bf49008ea989d62b9c63ae9e8d48dbff2a20 SHA-256: 80a68ab500570090ed2585490b2efc843d94fee470e1a349acb0fbe0a19ca4f3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File 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 LibTIFF and XFA forms. The PDF contains embedded scripts within its XFA form structure, which are likely responsible for executing the exploit. The embedded scripts are designed to leverage the vulnerability to download and execute a second-stage payload, although the exact nature of the payload cannot be determined from the provided information. The embedded URLs are related to XFA schema definitions and do not appear to be malicious themselves.

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
9006e0844e676d213f2a054424481fa60c25cba317cfa5ba89d44f561e8dc1a1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101351 bytes

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