Malicious PDF — malware analysis report

Static analysis result for SHA-256 7374f9d2ee0e30a0…

MALICIOUS

PDF

50.8 KB
MD5: 23a8b74efd063cbe39cd9c9f8bcbdbcc SHA-1: 71d907529aa9ab5ac3c69ab8fa509bf5be2de7bd SHA-256: 7374f9d2ee0e30a0f04747596300e2e4897b4d157cf0abbe6a070ab5dff5cedf
176 Risk Score

Malware Insights

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

The PDF file contains an embedded XFA form that exploits CVE-2010-0188 in Adobe Reader to execute a payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded file is likely the second-stage payload, but its contents could not be analyzed.

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.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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
6c3d15abb76f81d2e9d446a5613a0fa44040ba13862710ca73a37b5c5492d9eb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51249 bytes

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