Malicious PDF — malware analysis report

Static analysis result for SHA-256 55fea5a5082623ce…

MALICIOUS

PDF

99.6 KB
MD5: 2565f78b6d4f2568ecf8ce2cc44428ec SHA-1: a172c56ebace3b8ed4772d149684ccb469f4b228 SHA-256: 55fea5a5082623cebb19790baa9d890e70107f6272d4b1acf3725cac818be2d8
138 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader's XFA form processing. The heuristic firings indicate the presence of an embedded script payload within an XFA form, designed to leverage this exploit. While no specific URLs were identified as malicious, the exploit itself is the primary indicator of compromise. The embedded file is likely the 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
5e3af09f5a0edac95304ec2f0be089864e5747aff085048c807e83d9ed6d1ab1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101286 bytes

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