Malicious PDF — malware analysis report

Static analysis result for SHA-256 139b20f007ef28a7…

MALICIOUS

PDF

99.5 KB
MD5: 3b4ef32a85d20fbc0cc4c8139243fa1b SHA-1: ee2bd0234dc658774e1645e75a59bfd58e04de24 SHA-256: 139b20f007ef28a76777c9c22aeac46700b9bf5e31e783b1755530a6e98ac42f
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF document exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms. The exploit targets the LibTIFF component, allowing for arbitrary code execution. The presence of an embedded file and the ML classifier's high confidence further support its malicious nature. The document's content is obfuscated, but the primary attack vector is the exploitation of this known vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 script payload in PDF stream low 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 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
f0694805b6ef0cb07d6ed8a1e521a7644325ad1c7209d59b70870b038907c9ac		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101180 bytes

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