PDF malware analysis — malicious · 3d7be38608d32376

MALICIOUS

PDF

6.5 KB

MD5: 81a64e1b583b784199d32e47cf7b8aba SHA-1: dd01978b05ccff091cae1c55435c2fd60e979e69 SHA-256: 3d7be38608d3237648fee3c55d9bfab75d9f803777146912a5fa9ba52b8a5cdb

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream was further processed using unescape() and ASCIIHexDecode, suggesting obfuscation and potential exploit activity. An extracted JavaScript file, 'javascript_obj0006_000.js', was identified. The presence and obfuscation of JavaScript within a PDF strongly suggest an attempt to execute malicious code, likely to download and run a secondary payload.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `f56dcf8d4a784c28134bb8b662350906c20a90d923cac4770137f9d8cf6ff262`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	7856 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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