PDF malware analysis — malicious · bd61ac6cafac525a

MALICIOUS

PDF

27.7 KB

MD5: d4d3dc1a0ac2ea45ab18ccab5d4112af SHA-1: 6eb23194f771ec0adf859bec614bde673805a6ba SHA-256: bd61ac6cafac525ac9f3ddb567077a5196316a6dd1fda4e5e8ae9fd6194d5fd4

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded and obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36100) on both the main file and an extracted artifact confirm its malicious nature. The JavaScript is likely designed to download and execute a second-stage payload, a common technique for malware delivery.

Heuristics 4

ClamAV: Win.Trojan.Agent-36100 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36100
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `c3818356d64c4fb997392eacc2f6ff27e199d45a72ce1a317ba5220918af00e9`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	27621 bytes
Detection ClamAV: Win.Trojan.Agent-36100 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `f1c8d445f299ff6b39d4b46ab66b1f694260bb0f9079593cf50258dd3e3a733c`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	15189 bytes

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