Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f099a934966c91…

MALICIOUS

PDF

79.3 KB
MD5: 10719db27639fd5a63fdb59f767108cf SHA-1: 4a0e1a9857b8c87a9caba0f2a94575be1313cb76 SHA-256: 20f099a934966c91158d064c3c0ac8daa7ab0c4bb75021fcb4fa77ce2a1805cc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF and XFA forms. The critical heuristic firing indicates that the decoded XFA payload was matched, suggesting the PDF is designed to trigger this exploit upon opening. The presence of embedded script payloads within the XFA form further supports the malicious intent. The embedded URLs, while not directly malicious, are related to XFA schemas and could be part of the exploit chain or 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.
  • 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
6a5376a5258e4a0343f1bbb73f6a54ac6039c0c6112a4f50fd4c3691404db6f9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80467 bytes

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