PDF malware analysis — malicious · 2b39dea21cf537ba

MALICIOUS

PDF

51.5 KB Created: 2011-02-24 16:11:35 +02:00 Authoring application: WIKI MY CAMPUS LOANS (via mPDF 5.0)

MD5: 452fd760fe7a5467c77e0a39c22a13ae SHA-1: 8e2285a98c27591fd9d5e6f9ac36d3b62808da1b SHA-256: 2b39dea21cf537baf53fa308f4a1ca0503ab550d0c0608a1591ae0bab4f0c43b

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The 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_obj0034_000.js and javascript_obj0034_001.js, are the primary indicators of malicious activity, suggesting they are used to download and execute a second-stage payload.

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_obj0034_000.js` `357d06d70777f397a54fd04180a5ee36f36a8ec5c7cbbafdfab41f20901b25ac`	pdf-javascript-stream	PDF /JS object 34 at offset 0xC649	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_obj0034_001.js` `607a0753f2d28ea7a383d2e729ee9a1eeb69db22eafb74fa3e1d444ae047c123`	pdf-javascript-stream	PDF /JS object 34 at offset 0xC649	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).

Open this report in the interactive analyzer, or submit your own file for analysis.