Malicious PDF — malware analysis report

Static analysis result for SHA-256 310c593a69233ce2…

MALICIOUS

PDF

111.3 KB
MD5: 9f19fddcbd03e6bcccbd043992569193 SHA-1: 731e1455e5c69f828de8b7b3798eb297ab5501f4 SHA-256: 310c593a69233ce287d834959d92a8a1c869f998bdb862b8da0306c63930488d
248 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file contains an XFA form that exploits CVE-2010-0188, a known vulnerability in Adobe Reader. The heuristic firings indicate the presence of an embedded script within the XFA payload, which is likely responsible for further malicious activity. ClamAV detections confirm this file is malicious, specifically identifying it as 'Pdf.Exploit.Agent-6136306-0' and an extracted JavaScript exploit. The embedded script is designed to download and execute a second-stage 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.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
cb1549a914b5b9cec543e3f325538093792b5513bf3ea91b5f06182cf84b2e26		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113267 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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