PDF malware analysis — malicious · bd37540992e1f4fc

MALICIOUS

PDF

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

MD5: 4dc3b0c0c2aa3af85332cbbb72e2e544 SHA-1: e84bb7ae81edbe2498402c44bf7708b4b4faab4a SHA-256: bd37540992e1f4fc979a4fe6e7e36c9b4e97ecb9edf1ccba64b7a407f53e6cd6

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream itself is obfuscated and contains an eval() call, suggesting it's designed to execute arbitrary code. While the exact functionality is obscured, this pattern is commonly used to download and execute second-stage malware. No specific family could be identified due to the obfuscation.

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` `db357274d7968cf646bad03d44aea2e53777feef5a84d1695cbeac95fd38cfd8`	pdf-javascript-stream	PDF /JS object 15 at offset 0x315	29606 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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