Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c77d56dc3d1ae3…

MALICIOUS

PDF

82.1 KB
MD5: d2ac9fe758b343c11717306d1c5458b4 SHA-1: e4db619e865fe929b1509041deb65c0b81f9dfa7 SHA-256: e7c77d56dc3d1ae3d5a184bcdc5f65cd877dd24e49ebfaddfc3986911126c1c9
196 Risk Score

Malware Insights

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

This PDF file exploits the CVE-2010-0188 vulnerability, a known flaw in Adobe Reader's handling of XFA forms. The critical heuristic firings indicate that the PDF contains an embedded script payload within its XFA structure, designed to be executed upon opening. This exploit likely serves as a dropper for further malicious content, as suggested by the ClamAV detection name 'Pdf.Exploit.Dropped-93'.

Heuristics 7

  • 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
  • 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
9d16742d1900b4d074823a0ef40bb087fb736286a5a52da26e225d0b52f270c6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 83326 bytes

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