Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bff19721c8214e…

MALICIOUS

PDF

16.2 KB
MD5: 362e47c9d22c6dbb1645d24e861bbdc8 SHA-1: cc73b45e8259823d783cb7edb5390b514d7c735d SHA-256: a5bff19721c8214e109562ebb17cd9f4e5f221f7ef1799b77e0642cd9808c1b6
188 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains an embedded XFA form which triggers the CVE-2010-0188 exploit in Adobe Reader. This exploit is designed to execute arbitrary code. The embedded script, although not fully detailed, is indicative of a downloader or initial execution stage for further malicious activity. The presence of an embedded URL further supports the likelihood of a secondary payload download.

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
08252b1e89b49be86e95391dfb5d54e489a69bbe9a7bf16b97be5b00ee15fd62		 pdf-embedded-script PDF raw stream script payload at offset 0x359 15901 bytes

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