PDF malware analysis — malicious · 87673f799683d548

MALICIOUS

PDF

5.1 KB

MD5: acf74544b2c58e014b242697b87f567d SHA-1: c7e9322020efec6a45343cccbf74bb63959f13c8 SHA-256: 87673f799683d5483912ce165b42aed37d79b92a2ba7fb454f48fd2cbd8a74fc

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 PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() to execute arbitrary code. This script, named 'javascript_obj28947_000.js', is likely responsible for downloading and executing a second-stage payload. The lack of specific indicators for a known family leads to an 'unknown family' classification.

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_obj28947_000.js` `0cc651757c250d548210ddfc094a3985ab74788401341f00d68dd1b347876ed2`	pdf-javascript-stream	PDF /JS object 28947 at offset 0x13A	8386 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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