Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3e47f57472c919…

MALICIOUS

PDF

73.3 KB
MD5: 2d41bce84f62359ca63c100e2a615a0a SHA-1: 05a3987a0a0beacd77ec0966bdeb10850bcf55c6 SHA-256: 3f3e47f57472c91914b073ecc801751b4273a245ef0f3235169c6dcbb5dfdbd5
190 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is a PDF file that leverages XFA forms and exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of LibTIFF images within XFA content. This exploit is designed to execute an embedded script payload. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the exploit mechanism. The presence of an embedded URL further supports the delivery of malicious content.

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_0000034e.bin
2be3c064f057eec0dfcb14e741c0201b388e33df20e3218d2e11e6904af1da45		 pdf-embedded-script PDF raw stream script payload at offset 0x34E 74342 bytes

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