Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d6b218811d8d56…

MALICIOUS

PDF

62.0 KB Created: 2011-07-11 12:17:02 Authoring application: kXb
MD5: 748ed2573084ad56b6fff372ca41ab1b SHA-1: 76d70f2ba35ce99c51b795587ad82e16620b285f SHA-256: 13d6b218811d8d564e3313859b090d4a165a86502caf25eec7050470905e373c
122 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript payload that exploits the CVE-2010-0188 vulnerability in Adobe Reader. This vulnerability allows for arbitrary code execution, and the ML classifier strongly indicates maliciousness. The embedded script is heavily obfuscated, but the exploit itself is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
    • http://�wt.xfa.org/schema/xfa-data/1.0/
    • 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
stream_002_off00000318.js
ba791b58afad8aa0044551009d5de7940095ddb7b00a08f0432fe4dcdbddc883		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318 61724 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
embedded_pdf_script_00000626.bin
d8c006d1ac8e7f37ef8b6786eda344516df25ade934b2591ccb7fa95724693ea		 pdf-embedded-script PDF raw stream script payload at offset 0x626 62111 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 411 long base64-like blob(s).

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