Malicious PDF — malware analysis report

Static analysis result for SHA-256 0151d168d325bdb0…

MALICIOUS

PDF

93.2 KB
MD5: 8963378e665f9a0326664c2d186fb9fc SHA-1: d06fd5729dfe44b53290d209dba57cd2c2ce95de SHA-256: 0151d168d325bdb0d48e053c5c025247915b218229460f9f9f492ea12e17504d
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The file is a PDF that exploits CVE-2010-0188 in Adobe Reader, as indicated by critical heuristic firings. It also contains an embedded file and is flagged by a machine learning classifier as highly malicious. The embedded script payload suggests it is designed to download and execute a second-stage payload, likely leading to the execution of the malware detected by ClamAV as Pdf.Exploit.Dropped-78.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
46205e08a5d3ef90492029358bdf809df3b023dfd0daaeb886723b653f313d44		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 94684 bytes

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