PDF malware analysis — malicious · f2cc7d11a8a29b4e

MALICIOUS

PDF

8.4 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: c3645948ec9bf8ac7bd58957f9aad1e4 SHA-1: 73ca54448f8cfc5e8acf203c725a344bcc6662d6 SHA-256: f2cc7d11a8a29b4e1ded0565edfd5bbf5a99753b3146e135cd5b88447008759b

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The presence of `eval()` and `unescape()` calls within the JavaScript stream suggests obfuscation and dynamic code execution. The embedded JavaScript file, 'javascript_obj0021_000.js', is the primary artifact. This script is likely designed to download and execute a second-stage payload, a common technique for initial access in PDF-based attacks. The confidence is slightly reduced due to the lack of explicit URL or command execution details within the provided evidence, but the pattern is highly indicative of a malicious downloader.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0021_000.js` `233007dd4c921dbd6615a322ccc007d4c45ca3aad00fcaf2b898f6cea5ac7c54`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	5033 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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