Malicious PDF — malware analysis report

Static analysis result for SHA-256 29df58b1fe4ad477…

MALICIOUS

PDF

111.3 KB
MD5: acb58a328451302db0e58d0a829703ad SHA-1: f1907e76f7289db4ccd5822ac3df990a57313817 SHA-256: 29df58b1fe4ad4773b60d0679d8eb49614653ef1c0931adf8939293e1aec1c01
248 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms and contains an embedded script payload, which is a known technique for exploiting vulnerabilities. Specifically, the CVE-2010-0188 exploit is detected, targeting Adobe Reader. The embedded script, identified by ClamAV as Js.Exploit.HTML-27, likely facilitates the execution of a second-stage payload. The file is classified as malicious with high confidence due to these exploit-related findings.

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
6a6e9b203dedb5ed1e9f437add4c6056b4844f2797336e286c1f45e83005a76a		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113271 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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