PDF malware analysis — malicious · cb6fe64e1750f067

MALICIOUS

PDF

15.1 KB Created: 2009-06-06 12:30:26 +03:00 Authoring application: NitroPDF 6.0 (via BCL easyPDF 6.00.20)

MD5: 6ae66ed37b3ff128fd1928e19bf41553 SHA-1: 71639e77fc1f68ca843aefe8af45bd0e81f9c648 SHA-256: cb6fe64e1750f067d6c1e18e6540856a84b2e4628a5a491ad77ef25b4e94bd9b

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of an eval() call suggests code execution. The extracted artifact 'javascript_obj0015_000.js' further supports the execution of JavaScript. The 'PDF_IMAGE_ONLY_LURE' heuristic suggests the document may be designed to trick the user into interacting with it, possibly by displaying an image. The primary intent appears to be the execution of this JavaScript, which is likely to download and execute a second-stage payload.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0015_000.js` `0a3d81faef262ef4b4806c10d926e95a8e9fb84c161f263d59bb78b2de909a8d`	pdf-javascript-stream	PDF /JS object 15 at offset 0x315	29170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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