PDF malware analysis — malicious · da8210fb00ef859b

MALICIOUS

PDF

39.3 KB Created: 2011-06-10 16:29:35 +03:00 Authoring application: Wiki Direct Loans Department Of Education (via mPDF 5.0)

MD5: 85be9e924d0f4eacae164cdea4743773 SHA-1: 20f2c34789da098756d3b2127085358fdf566e51 SHA-256: da8210fb00ef859b811e7fce720ab150fac92a186fcbba198c906c5bcb2da8a3

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The high-severity PDF_UNESCAPE heuristic and the 'Suspicious extracted artifact' finding suggest that the JavaScript is obfuscated, likely to hide its malicious intent. The extracted JavaScript files, javascript_obj0027_000.js and javascript_obj0027_001.js, are the primary indicators of malicious activity, suggesting they are used to download and execute further payloads.

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 27 at offset 0x94D7	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0027_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 27 at offset 0x94D7	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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