PDF malware analysis — malicious · 8debe115151f0500

MALICIOUS

PDF

17.4 KB Created: 2009-06-29 14:20:07 Authoring application: kJeLMv9A (via XlURVQbrD2y6N)

MD5: 890460b73c7c0c96285ff17c6de8f4d5 SHA-1: c8f9589061ba8099b3134682320639406cd4517f SHA-256: 8debe115151f0500f28b17f6ac0e77ccbb3586f26fbda78691b71be4b20fb9ab

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristics. The critical ClamAV detection of 'Js.Trojan.Obfus-48' and the presence of an 'eval()' call within the JavaScript stream strongly suggest malicious intent. The obfuscated JavaScript is likely designed to download and execute a second-stage payload, a common technique for initial access and further system compromise.

Heuristics 6

ClamAV: Js.Trojan.Obfus-48 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Trojan.Obfus-48
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` `aa700219f9eb9b12a75f87376fc4a82a3198668d3fb5a9cac2d59d430feaaaf2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x238	16466 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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