PDF malware analysis — malicious · bf8c465f82bf1772

MALICIOUS

PDF

12.5 KB Created: 2009-05-11 09:35:50 Authoring application: lxhGEPp (via RFsdnpqQJ)

MD5: 66981dd1aaa190dc80728d74980410b3 SHA-1: fc07a191230b442beb5bab1f5333c326b519553a SHA-256: bf8c465f82bf177220102860d23c5b2d0d61b35cae3cb828edf4bcafff42f99a

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, PDF_JS, PDF_FROMCHARCODE, and PDF_UNESCAPE. The JavaScript stream, named javascript_obj0007_000.js, is likely responsible for the malicious behavior. While the exact actions of the script are not fully detailed due to potential obfuscation, its presence strongly suggests an attempt to download and execute a secondary payload or perform other harmful actions. The authoring application 'lxhGEPp' also appears suspicious.

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.
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` `979d6cfbf17f43f86b08b41c592608e4207a9fdb5e98e47ef52528112662cb2f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x236	11563 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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