PDF malware analysis — malicious · f7d5c262078b86e1

MALICIOUS

PDF

226.0 KB

MD5: 517bb1fcd2c3848deb405766416440de SHA-1: 3feb28045d0f5af32eae4be1ce1112e25fc48072 SHA-256: f7d5c262078b86e1fbfd79f80160229dd4079b8106b8032adb4219a9d6b2ad85

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'eval()' call and 'String.fromCharCode' usage suggest obfuscated code execution. The ClamAV detection 'Pdf.Exploit.Agent-36086' and the presence of a suspicious JavaScript file ('javascript_obj0006_000.js') strongly indicate that this PDF is designed to exploit vulnerabilities and download further malicious content. The document body was unreadable, but the script and exploit indicators are sufficient for a high-confidence assessment.

Heuristics 6

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)
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_obj0006_000.js` `9341d3e599b99c0179c1d061c1a25a414c58c44e26b431ae8e44aa65832527b6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	317817 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).

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