Malicious PDF — malware analysis report

Static analysis result for SHA-256 628392ab158aabec…

MALICIOUS

PDF

99.6 KB
MD5: 0dd7ba39cb0c8ba689c72036da76d4de SHA-1: dc9ffd3e9c1a7c60bf2e7c26cbfb39c15c311bfb SHA-256: 628392ab158aabec53a22ca86c4552445758544af23c8be3bcaf21dfb28d4ca6
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious, with critical heuristics indicating exploitation of CVE-2010-0188 via XFA forms. This vulnerability allows for arbitrary code execution, which is likely used to download and execute a secondary payload. The embedded script payload and ML classifier further support the malicious nature of the file.

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
5f0eebe5347d809595b1d87a451fb2df78aa5b458698b8cb0ae48b4666cba6e2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101250 bytes

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