Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc6994b4625b447…

MALICIOUS

PDF

70.6 KB
MD5: 3080313769430740597ec4853fd69850 SHA-1: adfaa2ca678d45f54943cc2f0e8a57c252c363f5 SHA-256: cbc6994b4625b44770fb411f11a523fa9ea8633bb4eef070434afa6195ba19a9
240 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.001 Spearphishing Attachment

This PDF document exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF. The heuristic firings indicate the presence of an embedded script payload within an XFA form, which is designed to be executed by the vulnerable reader. The embedded file 'embedded_file_obj0008.bin' is likely the second-stage payload. The document body appears to be heavily obfuscated JavaScript, making it difficult to determine the exact nature of the payload without further dynamic analysis.

Heuristics 9

  • 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.
  • ClamAV: Pdf.Exploit.Dropped-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
508dbebe9895e26ee5f01e10008f3bcba10452f8cdedd0a8ab9ce4af46c15457		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 71518 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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