Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b85a0983da4b1b2…

MALICIOUS

PDF

99.4 KB
MD5: 85e88d56719d958ffa399bd5ae86dbdf SHA-1: deacb7bf189c317e8eb788f1623b95a6d5ea239b SHA-256: 1b85a0983da4b1b2223ee092350227f8d76c2cbda937f16b59b1fccc1ee25781
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component, to execute a payload. The PDF contains XFA forms and embedded script content, indicating an attempt to leverage these features for malicious purposes. The embedded URLs, while not directly malicious, are associated with the XFA structure. The primary attack vector is likely the exploitation of the PDF reader vulnerability upon opening the document.

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
b4bcca56a75a9706af30d9c7ec122cd5b871b83a45acc24ec87412636a1d7324		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101038 bytes

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