PDF malware analysis — malicious · 26a8fcccc34ee58d

MALICIOUS

PDF

28.2 KB Created: 2010-03-16 07:18:36 Authoring application: wK3GN3 (via iXooeO0Wjm)

MD5: 22c21307e7f7fb932ea96ba0a880c56a SHA-1: ebb7cb38b584c7c67cee769813de29cdece17473 SHA-256: 26a8fcccc34ee58d9c32f19b1ec80a22a7c43ff333b03a70a7571785f0316052

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 is heavily obfuscated, utilizing String.fromCharCode and eval() calls, which are common techniques for hiding malicious code. The primary intent appears to be the execution of this obfuscated script, likely to download and run a second-stage payload. No specific family could be identified due to the obfuscation.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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_obj0007_000.js` `9dd5d8148193c53b184a982335e406f90cf2b0b4467d71bc8b82ae786b6256a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x243	27695 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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