Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9ad889e816e751…

MALICIOUS

PDF

90.1 KB
MD5: 4f731587d672cac9929acd27a02dd72a SHA-1: d2ea74f3900fde62a778014cd90830cc741d3aea SHA-256: fc9ad889e816e751bdbf3e86bcfea78059d907d40e976137753d4b23e8fa1610
136 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms. The heuristic firings indicate the presence of an embedded script payload within an XFA form, which is characteristic of exploit delivery. The script itself appears to be obfuscated and truncated, making its exact function difficult to determine, but it is likely designed to download and execute a second-stage payload. The embedded file is also suspicious.

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
4113b956ae84aae2aaf54ae0d6d7f7ae2b206d75459c2868a422214c399d6bdf		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 91539 bytes

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