PDF malware analysis — malicious · e682a1fdecd75ac5

MALICIOUS

PDF

4.0 KB

MD5: 7f80d027587738f5fb3d11171b233b8c SHA-1: cc1d28147b7193a551b255d479904ab387f12270 SHA-256: e682a1fdecd75ac59b50fad16e8614ba584ee56e70925f70f05d427deaa669d7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of 'eval()' and 'String.fromCharCode' suggests obfuscated code execution. ClamAV detected this as 'Pdf.Dropper.Agent-7317457-0', a known dropper. The embedded JavaScript streams are likely responsible for downloading and executing a second-stage payload.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7317457-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7317457-0
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `592f557db906a7d0550da53979453c4135ecfcae9cda50c3403d86a2e5f38f6c`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `76a90ec9582482513a04230e34f97cf48980257bfb0293ca4f3f84114221f1b5`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	5547 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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