Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbdda883940fad2…

MALICIOUS

PDF

99.8 KB
MD5: 56ef18c8fb6560067725f41cd934e7ab SHA-1: 4473f49f338aeba2d348b0bbd12ef92c565f7e2f SHA-256: 2fbdda883940fad2d1f40538def6e822531873d7975aaa83c8c0724326e68d83
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The critical heuristic indicates that the decoded XFA payload was matched, suggesting the execution of arbitrary code. The presence of embedded scripts and an embedded file further supports the likelihood of a malicious payload being delivered. The script content, though obfuscated, appears to be involved in downloading and executing a second-stage payload, which is a common attack pattern for this type of exploit.

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
5cb0a7b4c3f3d348ab423863785b23c491560d26f3311063ac4c3a1acb702dae		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101404 bytes

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