Malicious PDF — malware analysis report

Static analysis result for SHA-256 047ecbc63ff392cc…

MALICIOUS

PDF

99.8 KB
MD5: 6a71f68f40b703c74f09381b68e9d7a3 SHA-1: 8f9c2cfb7fd9ad2e67d9ac8fc5ebcc573f0ca5e5 SHA-256: 047ecbc63ff392cc4113027d1cbac2f833ac3a8cb4e0f0da1fecef72747a3649
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 an ML classifier and contains heuristics indicating the use of XFA forms and an embedded script payload. Specifically, the CVE-2010-0188 heuristic strongly suggests exploitation of a known Adobe Reader vulnerability. The embedded file and script payload are likely used to download and execute a secondary stage, although the exact nature of the payload is not discernible from the provided evidence.

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
cc7ce8dc76822b2fb9581e0a8a2380e97c222fa9dba6e7fafe6cec09b1b201b0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101490 bytes

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