Malicious PDF — malware analysis report

Static analysis result for SHA-256 e528eb0da5c20d58…

MALICIOUS

PDF

16.3 KB
MD5: 5c93e8da2face91e1aade27de34b8193 SHA-1: fc8f0cdf952feaa93763b7327d77b51f7638a751 SHA-256: e528eb0da5c20d58a2a115ac99d97fd8994c0cb6bf821ac2553a247d8ad4973c
188 Risk Score

Malware Insights

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

The sample is a PDF file that leverages XFA forms and is detected as exploiting CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component. The embedded script payload, detected by ClamAV as Pdf.Exploit.Agent-6136306-0, is indicative of a malicious document designed to execute arbitrary code upon opening. The embedded URL is likely related to the exploit delivery mechanism.

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
b02cb8bab5d5c158d06dbbcf3a785e745bdcdcfa2588d5c8b1da282ca5cdd615		 pdf-embedded-script PDF raw stream script payload at offset 0x359 15944 bytes

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