Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6cc86a83dfe69c…

MALICIOUS

PDF

79.2 KB
MD5: af83f320706fbbbf94e60134fd1958cb SHA-1: 7c4f23beea82c56c3315ae89d7598445475cf115 SHA-256: bc6cc86a83dfe69cf5cb01ea9fc050a217ad7c5bc31135207d9dc46be2f14a83
136 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The critical heuristic firing indicates that the PDF contains an embedded script payload designed to be executed by exploiting this vulnerability. The embedded script likely downloads and executes a second-stage payload, although the exact nature of the payload cannot be determined from the provided evidence. The presence of XFA forms and the specific CVE points to a common exploit delivery technique.

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
61c80f1dc078566c7add186cb3e7c23787288bb4afe1a6b4957a1cc1ba966bd3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80395 bytes

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