Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35351718df342bd…

MALICIOUS

PDF

66.7 KB
MD5: a57257f124d2914a3ea1914a6d6a4d77 SHA-1: 943b133415732749cc565491b6e91bf9664041cf SHA-256: f35351718df342bd57a297c5fb668f9a7c1bded44f6a4b2d49c4e6028753271e
136 Risk Score

Malware Insights

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

The PDF sample contains embedded XFA forms and triggers the CVE-2010-0188 heuristic, indicating it exploits a vulnerability in Adobe Reader's LibTIFF processing. The embedded script payload further suggests the execution of malicious code. The primary intent appears to be the exploitation of the reader to download and execute a secondary payload, though the specific details of the script are obfuscated.

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
36cba967553e34a5f59a8e3be75ee1f07231db4d58931a60baf996abe4a2a55c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 67560 bytes

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