Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d8db8775390f06…

MALICIOUS

PDF

93.1 KB
MD5: 352e326dbf7534ced833f83925ac9f86 SHA-1: 8ae9100475e524038344b37e96c7b65ba865dc49 SHA-256: 67d8db8775390f06641d7e12451c01fca65fd6cd2d2e136aedd1af23177a16f2
176 Risk Score

Malware Insights

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

The file is a PDF that triggers the CVE-2010-0188 exploit, which is known to allow for arbitrary code execution. The presence of an embedded script payload and an embedded file further suggests that this exploit is used to download and execute a secondary malicious 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
79928bd16994d87b3ad36ba9f6dd3c6c14016d3573c881ca48f7b8db071263fb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 94615 bytes

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