Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b193f74b8b008f7…

MALICIOUS

PDF

99.7 KB
MD5: f66986d9b9f4018e102d56f85fec9036 SHA-1: c9bedc325cb3f56145afa7c2c2ffb347211e9e4f SHA-256: 5b193f74b8b008f75d7bef843728498825cb79a52c0654843ff01fc8f57e5a5d
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 by a machine learning classifier. It exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms, to achieve code execution. The presence of an embedded file and XFA form further supports this attack vector. The exploit likely leads to the download and execution of a secondary payload.

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
2f50c1a3734431d6ba94626c4353470dbecf06a1f855278813dadbc2556e72ba		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101390 bytes

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