Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcac846c8f6913f…

MALICIOUS

PDF

65.4 KB
MD5: a473c25d20487f475aa317e2f14a5c8a SHA-1: ff8efb769be51443d42dbab7e520f7162a260315 SHA-256: dbcac846c8f6913f4536019627b9daaeefed7d4e629a5f732da4cbd9e87f5ae6
136 Risk Score

Malware Insights

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

The PDF file contains embedded XFA (XML Forms Architecture) data which is known to be a vector for exploits. Specifically, the 'CVE_2010_0188' heuristic firing indicates exploitation of the LibTIFF vulnerability within Adobe Reader. This exploit likely leads to the execution of arbitrary code, potentially downloading and running a secondary payload. No scripts were directly extracted, but the XFA structure itself contained executable script markers.

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
66d4cb6fbd4b5239ca49de9e22c715bb270001c282aa9ca33a570ddc15de0081		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 66263 bytes

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