Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a5d1833c30b8df…

MALICIOUS

PDF

5.2 KB Created: 2002-02-02 59:55:01 Authoring application: e
MD5: 5cf6853f5bd0a22f35950b825c0d2e61 SHA-1: b6bb47affa870b7e2ad523c047b85f56916b60eb SHA-256: 03a5d1833c30b8df9c8c9b42b73e528474f4a761d219f7a5739bd96ee557407f
122 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript file that is likely malicious, as indicated by the ML classifier and the CVE-2010-0188 heuristic firing. The embedded JavaScript is the primary indicator of malicious activity, suggesting it's designed to exploit the vulnerability and execute further malicious code. The extracted JavaScript file name is included as a high-priority IOC.

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
06987230d833c403948962a56de75a0e450a88631b57d53e6cd7e8376fcb13f7		 pdf-embedded-file PDF EmbeddedFile object 29 at offset 0x2E2 90 bytes
stream_003_off00000392.js
608c65657e241e1a4cbb5f89bcb3b62c1e0e22dcda91a883cfad1ce7a9d5d85d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x392 52617 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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