Malicious PDF — malware analysis report

Static analysis result for SHA-256 966341f2dc58ac6b…

MALICIOUS

PDF

183.3 KB Created: 2008-06-16 11:10:56 +08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: 2a6448256838668dd212ab2c07254982 SHA-1: aa0abf8d1e2b5ffb86dc6fcc101f2b31ed47d6b4 SHA-256: 966341f2dc58ac6b0085e1e4555ff89fcd2a899b13929ebb74052530bd8a2c68
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier. It contains embedded JavaScript streams which are likely responsible for downloading and executing a second-stage payload. The presence of embedded files further supports this malicious intent. The document body is image-only, suggesting a lure to trick the user into interacting with the malicious JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
c0a0d316e0a1c109962b4339.jpg
bd016d53444da4281f9ffed19f9cc28f60811b263f36ef91ec7a5cb3c4e1be72		 pdf-embedded-file PDF EmbeddedFile object 24 at offset 0x22A9 5340 bytes
javascript_obj0028_000.js
97e6c8fb70f6fedab160a41095c99dce3c9d53a0086d3a8d4e6d47cbe03dce61		 pdf-javascript-stream PDF /JS object 28 at offset 0x2BAC8 1946 bytes
javascript_obj0030_001.js
1b5a8c2bdff305d483f277d9392c7a0bdc0953199893db2b23104f801f9da789		 pdf-javascript-stream PDF /JS object 30 at offset 0x2C316 8238 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.