Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bd5e84cada252e…

MALICIOUS

PDF

79.2 KB
MD5: aa43feb11093411f2488572380472937 SHA-1: 79f1605f6a04e8d2351588bc1836812b262d029c SHA-256: 37bd5e84cada252ed6b07c81cdc22ae2b76ee4d4217dac1fe83c2854c4e41786
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The PDF contains an embedded script payload within an XFA form, indicating an attempt to execute arbitrary code upon opening. The embedded URLs are related to XFA schemas and Adobe, but their reputation is unknown or benign, suggesting they are not directly malicious IOCs themselves. The primary attack vector is likely phishing via a malicious attachment.

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
8624d78e19ea905880a4212bb933ed82e426c66b0f1b7ba4c7a2ff55995b483a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80357 bytes

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