Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9563c941a6efc2c…

MALICIOUS

PDF

75.4 KB
MD5: cc1a8d3b5c7336504d4e542a9436a359 SHA-1: ed63aa2813922132d1e25d97a4631d29a786a18f SHA-256: b9563c941a6efc2c9812b2951fafc16875123879751c440bfda013afc57a1759
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The file is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF. The heuristic firings indicate an embedded script payload within an XFA form, which is characteristic of exploit documents designed to deliver a secondary payload. The ClamAV detection further confirms its malicious nature.

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
996f3d158dfa0539dd3b7e94aad8ba87745c003630cfd4f4801d997dbe48754c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 76410 bytes

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