PDF malware analysis — malicious · a1063d81c830922f

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: 2ac8be5ae81ae7121ec67ffd354db5d8 SHA-1: 6755f68b54aed5a5f3872642c3a2a0fc023b38ce SHA-256: a1063d81c830922fe428fec1accbf361617e5b43a67012d0babcd57b38a6f4e9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is obfuscated using unescape() and String.fromCharCode, suggesting malicious intent. The primary heuristic firing is PDF_UNESCAPE, pointing to the use of obfuscation techniques common in PDF exploits. The extracted artifact 'javascript_obj0013_001.js' is likely the payload. The script's purpose is to exploit PDF vulnerabilities, leading to arbitrary code execution.

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` `7f446cba29a7f58e7f0c294b49518c2e036aceca60864c7372219cd7d286e0a3`	pdf-javascript-stream	PDF /JS object 13 at offset 0xC11	11257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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