Malicious PDF — malware analysis report

Static analysis result for SHA-256 1876f130f3f7a2a8…

MALICIOUS

PDF

50.8 KB
MD5: 99fc238676ec2c8827f717a97adb6d07 SHA-1: 04e3336af94df478c58201c6a40b8dbc2e7d371c SHA-256: 1876f130f3f7a2a80bdbd5d7cb504c7940c5cc46f5d90edf58df98b7ebf25b7d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file is flagged as malicious by multiple heuristics, including a critical detection for CVE-2010-0188, an exploit targeting Adobe Reader's handling of XFA forms. The presence of an embedded script payload and the ML classifier's high confidence score further support its malicious nature. The exploit likely facilitates the execution of a secondary payload, although the specific nature of that payload cannot be determined from the provided evidence.

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.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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 script payload in PDF stream low 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 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
9e253a1720d311ca53e55da407b4b72e12aa5fa8c90b0a4541337987774a09b7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51227 bytes

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