PDF malware analysis — malicious · 38e39f3daa85c1f1

MALICIOUS

PDF

6.4 KB Created: 2009-10-25 20:35:22 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: bbc0f6e9f2600a792535e949c89496a4 SHA-1: ed6f02a8a349090f2c1c78016a1210cbe1f97d6e SHA-256: 38e39f3daa85c1f16f76c71eed3044c278ccf9cc1c85e6cb63bd3662fefa4373

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, named 'javascript_obj0013_001.js', appears to be obfuscated, as suggested by the 'Script obfuscation indicators' triage signal. The presence of unescape() and String.fromCharCode functions further points to obfuscation techniques commonly used to hide malicious code. While the exact functionality of the script is obscured, its presence within a malicious PDF strongly suggests it's designed to download and execute a second-stage payload.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0013_001.js` `a4f4cbfbbccddb134bcc65c1d3634d5616481a2a1d87ceff109706fb370ebfb4`	pdf-javascript-stream	PDF /JS object 13 at offset 0xC11	11101 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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