PDF malware analysis — malicious · 500609de13ff44b4

MALICIOUS

PDF

40.0 KB

MD5: 0222810bddbe283bc53483fc0d6802e3 SHA-1: db8619d290563f9d3cbb63c13139e70b02d79460 SHA-256: 500609de13ff44b4518d4b9b6ac057793d83435c0ce77455ab01e80c9e735c1f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection indicates this is a known malware variant, Win.Trojan.Agent-36169. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely contains code to download and execute a second-stage payload, as suggested by the heuristic 'Suspicious extracted artifact — Signals: Script obfuscation indicators'. The document body content appears to be obfuscated script fragments rather than user-readable text.

Heuristics 5

ClamAV: Win.Trojan.Agent-36169 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36169
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
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_obj0008_000.js` `436cff00234397e48803d228e562fdc789a962070010d96bc5cd102d7e2530c7`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2019 bytes
Detection ClamAV: Win.Trojan.Agent-36169 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `6615bafdfca3443f4e226384bdb5b622622cea29fad1cb3aad6a924ef5787e9e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x9FE	2540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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