PDF malware analysis — malicious · 86d722fef8e4d263

MALICIOUS

PDF

5.1 KB

MD5: 98365ef8e5dc7617e0024800211f15d0 SHA-1: 14fcd8b7f418209d3e5ed8a56b632ac97937dac9 SHA-256: 86d722fef8e4d2639e4d59c062227f4b08c6285c5823759fb2279bb0f5eedbe8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, which is further obfuscated and utilizes eval() and String.fromCharCode(). This suggests the script is designed to download and execute a second-stage payload. The presence of script obfuscation indicators and the nature of the JavaScript execution point towards a malicious intent, likely for delivering malware. The specific family could not be determined 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. (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_obj491285_000.js` `9547f5d1d7dcf66022195a23fb6cd0717ec1dc0ae299d5cc6a6ec63a4bbdddce`	pdf-javascript-stream	PDF /JS object 491285 at offset 0x136	8374 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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