PDF malware analysis — malicious · 2d8687a4caf752ea

MALICIOUS

PDF

40.0 KB

MD5: 096437729fe7c43d28867aeeae18f533 SHA-1: ad2f1a1cfe61e4a34cbf4e307e44b18480243893 SHA-256: 2d8687a4caf752ea9ef98d28bf249b0c26ec297cade86d28197a6cbf80b0682c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection 'Win.Trojan.Agent-36169' strongly suggests malicious intent. The deobfuscated JavaScript, 'legacy_pdfkit_stage_000.js', likely facilitates the download and execution of a secondary payload, a common technique for initial access and further infection. The document body content appears to be obfuscated script fragments rather than user-facing 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` `76fb5d194f0a9b930d84df6885549e676ba872da82026f05504f583dcb3c015e`	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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