Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b126b1744456a4d…

MALICIOUS

PDF

99.6 KB
MD5: 4be336641f26f253f44599ff540db4a1 SHA-1: d895099610195fb594bf0f7d9d758ce0f4aa55f9 SHA-256: 2b126b1744456a4dd25b48819bdcc91ec69c1d62b5185952b587f7dc440831ce
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1204 User Execution

This PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader via an XFA form. The embedded script payload is indicative of an attempt to download and execute a secondary stage. The presence of an embedded file further supports this malicious intent. While the exact family is not identifiable, the exploit and script execution pattern is common for initial access.

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
58b6ff93cad29edb85f19aff6829f1135d0a10742e6497ce0c44ce4a5800d4a9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101293 bytes

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