Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f870e0b6b5575d7…

MALICIOUS

PDF

99.9 KB
MD5: 7cd7bd03a8fdd1169eb346acadac5892 SHA-1: d2872c6549efaa47d45cc1ca20d9da4ecb870994 SHA-256: 7f870e0b6b5575d76a55876f749214cc575c4ec1b0600cbb2dfdaf9e95a0f14d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader's handling of LibTIFF XFA images. The heuristic firings indicate an embedded script payload within an XFA form, which is characteristic of exploit delivery. The script itself appears to be obfuscated, but the primary attack vector is the exploitation of this specific CVE.

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
ac54d5777e08e2d2693048d41b9da93af0b583c1f59d9a83d86fa02983bfdcb2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101578 bytes

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