Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ec1bb481c8f8e6…

MALICIOUS

PDF

13.0 KB First seen: 2013-09-08
MD5: 60d24c453ab84d053ed5fc2ba34a0a1e SHA-1: c47b12518d94e800d83fb8c2c2805ca9b18a4a68 SHA-256: 41ec1bb481c8f8e6fd711e746c02bf6e0e55af2e550b0151f0ec31a1052a52d2
130 Risk Score

Malware Insights

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

The PDF file contains embedded script content and is flagged as having an embedded script payload. The document body contains obfuscated JavaScript that appears to be designed to download and execute a second-stage payload. The embedded URLs are not directly malicious but are associated with the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/ 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
    • http://ns.adobe.com/xdp/\In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0009.bin pdf-embedded-file PDF EmbeddedFile object 9 at offset 0xD5 12513 bytes
SHA-256: 252dcde3d3b7da89c4f68cfdfc545b5955507f5fd876c9283c95f775aad893a4

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