Malicious PDF — malware analysis report

Static analysis result for SHA-256 598edb16f869e5d9…

MALICIOUS

PDF

62.8 KB
MD5: 7eaa7b77c4198edcd9a056c745097987 SHA-1: 14264cf66f5efae26f94f69645289146050588b7 SHA-256: 598edb16f869e5d92cfcdd3aa9a1e06c24ca0237753ed4cd0b80af21741e14da
196 Risk Score

Malware Insights

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

This PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF parsing. The critical heuristic firings indicate that the file contains an embedded script payload within an XFA form, designed to leverage this exploit. The embedded script is likely responsible for downloading and executing a secondary payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Dropped-93'. The document body content is heavily obfuscated and does not provide clear user-facing text, but the technical indicators strongly point to a malicious exploit delivery mechanism.

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-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
c8367861d995fab81d70d27035320c89493e80d74ea2f89a530c07164b0f1529		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 63501 bytes

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