PDF malware analysis — malicious · 7eff393e6d8de3b2

MALICIOUS

PDF

4.3 KB

MD5: 4db38e7b4520f911fce91b36c9ce6670 SHA-1: 6997ddeb5bcbe5fe71ed4f1f1695e51723c91676 SHA-256: 7eff393e6d8de3b281a90f6513c0818e5f55cb3f2ed99b3edce0d88e9e9884d7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and String.fromCharCode, suggesting obfuscation and dynamic code execution. ClamAV detection as Pdf.Dropper.Agent-7428385-0 further confirms its malicious nature. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7428385-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7428385-0
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_obj1347_000.js` `b2fbfdc4bfa323cd0f4e830c767aa0b7f070a449c75f637d44c65c7365efb5a9`	pdf-javascript-stream	PDF /JS object 1347 at offset 0x136	8303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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