Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5c3091ff3a8b95…

MALICIOUS

PDF

63.1 KB
MD5: 974629f4d788559cd237da5efc128cde SHA-1: bba62a0cbd090baddb9b26fd07f5b5547d9cb4f6 SHA-256: 1c5c3091ff3a8b95dbaaffe904d47f9377299917cd520367b996cc3fb7e2472e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Clickjacking T1059 Command and Scripting Interpreter

The PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The presence of embedded script payloads and the ClamAV detection as 'Pdf.Exploit.Dropped-93' strongly indicate malicious intent. The embedded URLs, while not directly malicious, are part of the XFA structure that facilitates the exploit.

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-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
94e489f198ef67376f1d91506f6735824bb95130fb9c4a04586eff99257c2dd0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 63904 bytes

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