Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ace3638ebe7983b…

MALICIOUS

PDF

111.7 KB
MD5: dd2b647984cafd897ef4dacb700f6de2 SHA-1: 22c7cdc264dc19e26d1079b19467d19518509352 SHA-256: 1ace3638ebe7983b9aa2fa73b70121d95a8d237f10c28bee146624d017c45757
190 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell T1566.002 Phishing: Spearphishing Attachment

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA forms. This exploit is designed to download and execute a second-stage payload. The presence of embedded scripts and the ClamAV detection further confirm its malicious nature. The document body content is heavily obfuscated and appears to be a string concatenation, making its exact purpose difficult to ascertain without further analysis of the embedded script.

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://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_pdf_script_00000238.bin
9f17ea9b90b873e0c3f158ae46ec0eabfb6362f5cd1b0673d15ecb4dcf8b0731		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113641 bytes

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