Malicious PDF — malware analysis report

Static analysis result for SHA-256 da862900cbaad93d…

MALICIOUS

PDF

86.2 KB
MD5: de3d8b7b51d0775ffe108bf641e92221 SHA-1: 4693e8bc8016ffb5a0f4ed5f3415798f188ddf49 SHA-256: da862900cbaad93d0f7d7fa216edc78a4062ff4db54a7ceaf0da10376ece59d2
198 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is a PDF document that contains an embedded script payload and triggers the CVE-2010-0188 exploit for Adobe Reader. The XFA form within the PDF is identified as containing executable script, which is characteristic of exploit delivery. The embedded file and script suggest the PDF is designed to download and execute a secondary payload.

Heuristics 7

  • 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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
45ffa57fbc0ff64ceb78c5c039ef39038c59dd9ca39ab5351b7b7b2fb982327d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 87494 bytes

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