Malicious PDF — malware analysis report

Static analysis result for SHA-256 600fb553fb791635…

MALICIOUS

PDF

5.2 KB Created: 2002-02-02 59:55:01 Authoring application: e
MD5: 5824488b0bc1690a4673c14bfcf6bdf9 SHA-1: f525926f0fdee0750c969ad63e4187d8eb4fbf8e SHA-256: 600fb553fb79163515d72da7b4e0bddbb1f359bd7ff768897cb9e5ee46118b51
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded JavaScript payload triggered by the CVE-2010-0188 exploit targeting Adobe Reader. The ML classifier strongly indicates maliciousness, and the extracted JavaScript file is the primary artifact of interest. The benign URLs present are likely decoys or related to XFA form functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0029.bin
052fbb3122e6d2e7463b5d81b51b28e85e94301562fc62464478a53a1c98c2b8		 pdf-embedded-file PDF EmbeddedFile object 29 at offset 0x2E1 69 bytes
stream_003_off0000037e.js
4a770aa5953ed63e1d65e4475b4025b79783d3ffcc5a2a1303c08bd795ac45da		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E 52660 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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