Malicious PDF — malware analysis report

Static analysis result for SHA-256 85061d4c1d7011ec…

MALICIOUS

PDF

114.3 KB Created: 2009-07-23 08:47:32 UTC Authoring application: Acrobat Web Capture 6.0
MD5: 66753cadcb8bd537af50f2ae92d7627b SHA-1: 67f83d6c01b00aa550da520a85cdbafd85fcb735 SHA-256: 85061d4c1d7011ec79da428a31cb8186c8d58b03568c6b1eb442fe0ec87bc67a
138 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A secondary embedded PDF was also found with suspicious static findings. ClamAV detected this as Pdf.Dropper.Agent-1828811, indicating a dropper functionality. The embedded JavaScript, javascript_obj0036_000.js, is likely responsible for downloading and executing a second-stage payload, which is a common technique for droppers.

Heuristics 6

  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • ClamAV: Pdf.Dropper.Agent-1828811 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828811
  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0036_000.js
241720d05eb9f1399739386460cd49222f3f00f2fb3c825f619c05307ac296bd		 pdf-javascript-stream PDF /JS object 36 at offset 0x2A35 1803 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
polyglot_child_pdf_off000199f1.pdf
3d39e6230ca4ef29355964dd9cedafe554e0e406e9665a0525bf95626c359dbb		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x199F1 12104 bytes

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