Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6137b6adadd5ec6…

MALICIOUS

PDF

99.5 KB
MD5: 042159ad9217e889caf209c25e392bf9 SHA-1: dcb22e0d5d2a96a37f12da3865d97b0d5d9b4506 SHA-256: a6137b6adadd5ec6d23cf65e86a60f8b1f788aa43786037d85895ddff6e752b9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1566.001 Phishing: Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The presence of embedded script payloads within the XFA form indicates an attempt to execute malicious code. While the exact script functionality is truncated, the exploit and embedded script strongly suggest the PDF is designed to deliver a secondary payload.

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.
  • 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
f8fd2bc871ab36d1603f626f776fafd8054ada3c8a9ee846e6b5ee0fc9f83a1f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101174 bytes

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