PDF malware analysis — malicious · 5861e79e750331c7

MALICIOUS

PDF

226.1 KB

MD5: c086b70a657d321f159c31ea99fcbc91 SHA-1: 7b16b1f57783e4064eceefcc5e1495beb029a4ca SHA-256: 5861e79e750331c72b8666813bba97882bae6ae44c78c967ad0cf189f27ef06c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with eval() calls and String.fromCharCode usage, indicating obfuscated code execution. ClamAV detected this as Pdf.Exploit.Agent-36086, strongly suggesting it's a malicious exploit. The embedded JavaScript file, javascript_obj0006_000.js, is likely responsible for the exploit delivery. The document body was unreadable, but the heuristics and ClamAV detection point to a malicious PDF exploit.

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` `1c447d20218c8980cf45bf270e8a1d24eab755c5f04370f09b4524676da66621`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	322326 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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