PDF malware analysis — malicious · e5c5868fc6b64bb2

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: c93dc78725e0b75be2055717c3377d34 SHA-1: 1d173fa01c7bdcc0de171273f4dcd3ee61f49094 SHA-256: e5c5868fc6b64bb2dcc7ad68adeeddafcd14b90907df55b1139aeeff89f15890

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream, identified as 'javascript_obj0013_001.js', appears to be obfuscated, as suggested by the PDF_UNESCAPE and PDF_FROMCHARCODE firings. This script is likely designed to download and execute a second-stage payload. The presence of JavaScript actions and streams within a PDF is a common technique for delivering malware.

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` `b38a09d7e498076ba3571d8984e90a85e7466ddd759fbe206af1d8f9aeea189a`	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).

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