Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8af5a491da6545…

MALICIOUS

PDF

111.4 KB
MD5: bea7393237c2e025f25a0d9f78696612 SHA-1: 7100db565be890da522f5d3ee6a2f7c5484b3288 SHA-256: 3b8af5a491da6545249872d1a922bae18c36effd35948e0544ff9b14d9576b7e
248 Risk Score

Malware Insights

MITRE ATT&CK
T1190 Exploit Public-Facing Application

The PDF file contains an XFA form that leverages the CVE-2010-0188 vulnerability in Adobe Reader. This exploit likely downloads and executes a second-stage payload, as indicated by the embedded script payload and ClamAV detections of PDF exploits and JavaScript exploits. The embedded URLs are related to XFA schema and are not directly malicious.

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.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
17d08c9e04d70af0b7cff4b6a735b8ae4e50aa24d133d2f1ec4a1965bceecb2a		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113395 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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