Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf8ca3ff3b624d1…

MALICIOUS

PDF

79.0 KB
MD5: 63f934f32d79bd69acff154573aec579 SHA-1: 9c57b228bb49172773bfd0bf5c06e49ce6793fb1 SHA-256: caf8ca3ff3b624d101ccbe4807d406ccc1ec2817cead409fe1fe887cdb7c3aff
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component. This is indicated by the critical heuristic firing for this specific CVE and the presence of XFA form elements which are often used in such exploits. The embedded script payload further suggests the execution of malicious code. The primary goal appears to be the exploitation of the reader software to gain control.

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
d72dedf2bed3e32aedd020077d742867bfc70f2b472cf86878959e6c8e399c21		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80170 bytes

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