Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a91bef84731fcb…

MALICIOUS

PDF

12.6 KB
MD5: 94abb256c45de7e1a7ae4bc550283caa SHA-1: 52d809171c16b00741cab33a3aa2df0b54c47a58 SHA-256: c9a91bef84731fcb99786cab122b1c2b786bd3a44c9fe412b5142b48c907c29f
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an XFA form with an embedded script, which is indicative of an exploit. Specifically, the CVE-2010-0188 heuristic fired, pointing to an exploit targeting Adobe Reader's LibTIFF component. The embedded script is likely responsible for executing the exploit payload. The embedded URL is likely benign, related to XFA schema definitions.

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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
f70a0a6ac1a30f820bb1c0c55aeac8c9d73f7b62cdc499feee622dbf5f6469d4		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12185 bytes

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