Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cd1caad862a7ea…

MALICIOUS

PDF

99.8 KB
MD5: c9cab1e2ff7a5b701e717b1c1a8256a1 SHA-1: a0cc158dc5869fd4be72d4c7ebaaf5635031c8e0 SHA-256: e7cd1caad862a7eaf497f44336d6692fa72fcdcc7163c7100bf548ecc9ba1363
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The PDF contains an embedded script payload, indicating an attempt to execute malicious code upon opening. The embedded URLs are related to XFA schemas and do not appear to be directly malicious, but the exploit itself is the primary attack vector. The script's exact function is not fully discernible due to obfuscation, but it is likely designed to download and execute a second-stage payload.

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.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
984fdc95ac6d22b2369d6603fd7af46f675bc07bc0f00da42555097bd212a9c5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101413 bytes

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