Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c7bfdf48df883a…

MALICIOUS

PDF

102.1 KB
MD5: 91804937cf458c253f51fd580f21ffd1 SHA-1: 9cb25651ba3d4753bf061467f2687f89adf982e3 SHA-256: 77c7bfdf48df883ae52e9475c6b926cec80ea3fade4a0b6a746a3f8d58ffd89a
188 Risk Score

Malware Insights

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

The PDF file contains an XFA form which is known to be a vector for exploits. Specifically, the CVE-2010-0188 heuristic indicates exploitation of a LibTIFF vulnerability within XFA forms. Additionally, an embedded script payload was detected, suggesting the file's purpose is to execute malicious code. The ClamAV detection further confirms its malicious nature. The embedded URL is likely part of the exploit chain or a command and control beacon.

Heuristics 6

  • 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
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000346.bin
69a6cc3f9416d7639946a1875e2341abb13caed8e06722387e835deeae0e8e65		 pdf-embedded-script PDF raw stream script payload at offset 0x346 103824 bytes

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