Malicious PDF — malware analysis report

Static analysis result for SHA-256 c720cd7bd1c79a63…

MALICIOUS

PDF

14.0 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 740f4c58c1c54377043ede0a9caa9da4 SHA-1: 90227c22796f0a1e2232832317bca8d76baa875d SHA-256: c720cd7bd1c79a63aaf025ab970f854f53a12bac678831e84a98434628bf41cb
198 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.001 PowerShell

This PDF document exploits the CVE-2010-0188 vulnerability in Adobe Reader, leveraging XFA forms to deliver a malicious payload. The embedded script, reconstructed from concatenated strings, appears to be designed to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 8

  • 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-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0006.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x1E7 84 bytes
embedded_file_obj0007.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x289 228 bytes
embedded_file_obj0008.bin
5b9c08576c6195ff55e0cc096e83cc39a46e0d8e2223d22fc5952ae1a1f71c05		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x3AF 1054 bytes
embedded_file_obj0009.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x81B 199 bytes
embedded_file_obj0010.bin
62c2595280e0eb55246b47bb5631f285476a4fcdb5a97620bd5898307a4a644c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x933 10638 bytes
embedded_file_obj0011.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x330F 77 bytes
embedded_file_obj0012.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x33AA 56 bytes

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