Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffc58a338ca2073…

MALICIOUS

PDF

79.2 KB
MD5: 64aad1e99bb13983dd49ba1ee05dbef4 SHA-1: feadb1712c7add58f3cecbf7f4c9d19cf5e5d9ca SHA-256: 8ffc58a338ca2073c36ff3bdd7af5462ba3cf4fb5a90cd7e24d5232196b55fcf
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF processing within XFA forms. The heuristic firings indicate the presence of an embedded script payload within an XFA form, designed to leverage this exploit. The embedded file and script suggest the document's primary purpose is to deliver and execute a malicious payload. No specific family could be identified, but the exploit vector is clear.

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
343e7eb942e6e4061a6d244c9e8a96614708f72912990a7da0645b04a5c95130		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80350 bytes

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