Malicious PDF — malware analysis report

Static analysis result for SHA-256 018ad105505a5d05…

MALICIOUS

PDF

59.8 KB
MD5: cca7779822344464237a516e3331d310 SHA-1: f36c407bf9153545c6d368992458933c6224c33d SHA-256: 018ad105505a5d058bc856be781abb7b1c18582c2e3b006c18b16b9b6d60472c
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service T1566.003 Phishing: Spearphishing Link

The sample is a PDF document that leverages an XFA form to exploit the CVE-2010-0188 vulnerability in Adobe Reader. The critical heuristic firing for this CVE, along with the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD firings, strongly indicate that the document is designed to execute a malicious payload upon opening in a vulnerable reader. The embedded file further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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
5f3a62e63fb9e64eccd8d4d1692a6480945da4ac87f6e4fb81eb173650f047df		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 60534 bytes

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