Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3ad76e98f0b9ea…

MALICIOUS

PDF

75.8 KB
MD5: 665abe2fe30be59e12649a04bc5e5276 SHA-1: 5c545448f2c9433ed3ab868280d95b8973045896 SHA-256: cb3ad76e98f0b9ea2c0c13a201903f743b5247767ecaf52dba619d69ce03cf30
196 Risk Score

Malware Insights

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

The PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader's handling of LibTIFF XFA images. The embedded script payload within the XFA form indicates an attempt to execute malicious code. This exploit likely leads to the download and execution of a second-stage payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Dropped-78'.

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
d6c7135e086a502f34a2ddd658642c12facf6fc983964ecc941caac3c1504c90		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 76885 bytes

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