Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b4c2993762839b…

MALICIOUS

PDF

4.2 KB First seen: 2013-06-14
MD5: 5910b5e4487dd8dd7d60c06bb50c4d4d SHA-1: cb3cc277e705b47f286b787a1223cb4c285b5fd9 SHA-256: 49b4c2993762839b13fa7298fa27decf7e51d3a7a05b464538528d29738ceafc
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file was flagged for containing an embedded script payload. This suggests the document is designed to execute malicious code when opened. The embedded script is the primary indicator of malicious intent, likely serving as a downloader or initial execution vector for further stages of an attack. The presence of XFA forms and embedded files are common characteristics of malicious PDFs.

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 info 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 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 12897 bytes
SHA-256: 26c1e3d733f45524287b88297f6a01686b5b03049e0fc64141eb3c50fabc93a6

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