Malicious PDF — malware analysis report

Static analysis result for SHA-256 7083c1be53b404e1…

MALICIOUS

PDF

11.8 KB
MD5: 59b647f8b70be6fa9594002ea3477377 SHA-1: 369af64bae2dc2501c2ed8112681a23b7c8979d6 SHA-256: 7083c1be53b404e1bd72ac1acd7038c7121755e63540f2e95499a1bbb69426e5
176 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded XFA form, which is known to be vulnerable to CVE-2010-0188. The heuristic firings strongly indicate exploitation of this vulnerability for client execution. The embedded file and script payload markers further suggest that this exploit is used to download and execute a secondary payload. The benign URLs present are likely part of the XFA form structure and do not indicate malicious intent.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
d4dfb3e7f985424cafe7052a78e0ddf3157bc3b81b79684b02c96e45aabf1a82		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11364 bytes

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