PDF malware analysis — malicious · 55a4d0dbdd4fee06

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: 8deba5d5d79ec3f4fa03251bc5fe97c1 SHA-1: fd9398ce748f130fcb7409d6ea1c7eda7a2f72b3 SHA-256: 55a4d0dbdd4fee06d509ca153d5b85b45e4e6eed8f627d89906564793c7cca2e

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript with obfuscation indicators, including an eval() call. This script is likely designed to download and execute a second-stage payload. The presence of JavaScript actions and streams, along with the 'Suspicious extracted artifact' heuristic, strongly suggests malicious intent.

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` `c19e91f6d4d79098847e150a014ec97bd5f63410b5e8b1215d1bbd11d3937e61`	pdf-javascript-stream	PDF /JS object 15 at offset 0x315	29122 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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