Malicious PDF — malware analysis report

Static analysis result for SHA-256 7465df24c9f2247b…

MALICIOUS

PDF

4.2 KB
MD5: 525bd0dca9433ed29c4086df6154a9d6 SHA-1: fb3299fa3b859121560c9c7dbdaa34d9a6bc0d2d SHA-256: 7465df24c9f2247b60b32e973be1bc43a7ef0b672076a230afb5b9971bd87047
116 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded XFA form, which is known to be vulnerable to CVE-2010-0188. This exploit allows for arbitrary code execution, and the ML classifier strongly indicates maliciousness. The embedded file and script payload markers further support the likelihood of a secondary payload being downloaded and executed.

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/1.0\ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0e2cbd8dcd97ac4290dc450e121cc2201c5caa25df0af894d5d09a861036b2bc		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 12945 bytes

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