Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d350305dc57f24…

MALICIOUS

PDF

72.9 KB
MD5: 197c274bf5beb945856a6edf244be75c SHA-1: 1303242c1e4609d203253af2168e33e6f812f544 SHA-256: 34d350305dc57f242090a3c9df9ed55b7357e070e277327315109330b00b19a4
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) content which is exploited via CVE-2010-0188, a known vulnerability in Adobe Reader. The critical heuristic firing indicates a matched decoded XFA payload, suggesting the execution of arbitrary code. While no specific script was directly extracted and analyzed, the presence of embedded scripts and the nature of the exploit point towards a downloader or dropper functionality. The embedded file artifact further supports the idea of a multi-stage attack.

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
54814f98cf1a72529bd4c05418545e06d84ee510b60e3a0f4876769eda1af521		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 73897 bytes

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