PDF malware analysis — malicious · 9f5b534c8e4f2e0c

MALICIOUS

PDF

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

MD5: 4fe1c69945b097639ee86f6ffb5913f9 SHA-1: 512b4f9afd05433b9ba4743cd2173cd0c58ff98b SHA-256: 9f5b534c8e4f2e0cdb4b99232f1e41debeda7db1ba6f2fe5ac3a0acd32b516ed

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript with an eval() call, indicating obfuscated code execution. The heuristic 'PDF_IMAGE_ONLY_LURE' suggests the document itself is not informative and is likely a lure. The presence of 'javascript_obj0015_000.js' further supports the execution of malicious JavaScript. The script's intent is to download and execute a second-stage payload, but the exact URL or payload could not be determined due to 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` `fc9248e62a9ff7dc909347790fba496830699dbe7db73e2071bcba4f38f05c81`	pdf-javascript-stream	PDF /JS object 15 at offset 0x315	28305 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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