Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5fc307342b26e9…

MALICIOUS

PDF

86.1 KB
MD5: 472e5c8f17c4c9ba6f529ad7f749b47d SHA-1: f8286d343491b05509c929425a50d22b128c4f0c SHA-256: 9c5fc307342b26e9a7676f2a3b0ff6d398db5185b34b701f0885b7167cb1bc87
196 Risk Score

Malware Insights

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

The PDF file contains embedded XFA forms and scripts, triggering critical heuristics for CVE-2010-0188, an Adobe Reader exploit. The ClamAV detection 'Pdf.Exploit.Dropped-78' further confirms its malicious nature. The embedded script payload is likely responsible for executing the exploit, leading to the download or execution of further malicious content.

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
e9d27fd0fb216ee39526d99bab7f1825a8f98922ff8f55e87affa967f39f159a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 87427 bytes

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