Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef135c5bcd18d1c2…

MALICIOUS

PDF

63.5 KB
MD5: 1d2394f8b73bc800761ccc2f0fa1d158 SHA-1: e5f52ef60c3f366c7e6b486ecc458651a71bf152 SHA-256: ef135c5bcd18d1c24957be9a846ee631b6d728742250821fe72ec41e4f36eaa6
136 Risk Score

Malware Insights

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

The PDF file contains an embedded script within an XFA form, which is designed to exploit CVE-2010-0188 in Adobe Reader. This exploit likely leads to the execution of a malicious payload. The embedded file artifact further suggests the presence of additional malicious content. The confidence is high due to the direct exploitation of a known vulnerability.

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
881f09335f6b6c71403cbd89557882ab3a5056907eadc3259dd663168d0fa2da		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 64320 bytes

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