PDF malware analysis — malicious · ebe582c50b43c8da

MALICIOUS

PDF

118.7 KB

MD5: c7ddcc99770f13752117b289e823f5de SHA-1: 8dea2e1bfe94d6d50d33def427e52d7adf0a96dc SHA-256: ebe582c50b43c8da19766ee9f1cb0e9072a96d917567be030f9eb9bb53d74d68

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a high-severity heuristic firing for 'eval()' and a 'Large comment-padded JavaScript eval stager'. ClamAV also detected the file as 'Pdf.Exploit.Agent-36086'. These indicators suggest the JavaScript is designed to exploit a vulnerability within the PDF reader to execute arbitrary code, likely to download and run a second-stage payload. The exact payload or exploit target could not be determined due to obfuscation.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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_obj0006_000.js` `ebda98a842a3b70cdb999c501c59d6bf6870f6a9c3b6229e8b018ff1102ac3a1`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627855 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `684aad940ceb2b78d3adcfc47c63ed8559f7263508b8f567cf70374e6bded58d`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 568 long base64-like blob(s).

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