PDF malware analysis — malicious · 58c3e424822b975c

MALICIOUS

PDF

40.0 KB

MD5: 02048b22eb7f58c6c72d8b7abfac7473 SHA-1: 604112dd47876a55039dc43bd6e3b17135ca9287 SHA-256: 58c3e424822b975cec5a459997d6d152ebf55fa654910ca91663165a649c089c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection confirms this is malware, specifically Win.Trojan.Agent-36169. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely attempts to download and execute a second-stage payload, a common technique for initial access.

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` `485b1902972804a84eca3fb76393f3d499f18363c7b35d222c2bda9882bf7b1e`	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` `dd93350d7e7d17f9d32b4dbab484694241353a254b3d770d956c991f0e1733f8`	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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