Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4d8258b3291d88…

MALICIOUS

PDF

16.0 KB
MD5: 4386ee5ccadca427e7dec5bda290e33c SHA-1: a31e23bb4d5904d6d805daf81a3ec28b5c3b5a1b SHA-256: 7f4d8258b3291d8892d41d7f43b57bda081ebd6fb5b8d668a30e2f60cbe7035e
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The sample is a PDF file that leverages the XFA (XML Forms Architecture) feature to exploit CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF handling. This exploit is designed to download and execute a malicious payload. The embedded script within the XFA form is the primary mechanism for this exploitation, indicating a delivery method aimed at tricking users into opening a malicious document.

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_0000034e.bin
afa5950b313ede1707d9c542273e2ca1a016de29cde3751ee7b7b53b080ae2cc
pdf-embedded-script PDF raw stream script payload at offset 0x34E 15701 bytes