PDF malware analysis — malicious · c83d065add367507

MALICIOUS

PDF

27.7 KB

MD5: b54b3552d22eeca54cdeae5cb256fdf5 SHA-1: 1d59a53a0226b0607f154d927fb4846e38ed22dc SHA-256: c83d065add3675076f159feadb1ec20d577a9d7713c76620f988b76d1e5cad22

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected by ClamAV as Win.Trojan.Agent-36100. Static analysis revealed embedded JavaScript, which is often used to download and execute further malicious content. The obfuscated nature of the script suggests an attempt to evade detection. The document body content is highly obfuscated and does not provide clear user-facing text.

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` `7264d88d6befbfecbd9b214317e3f173cee941bf8f1c0f08154e4aa414f18b85`	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` `2e3bafd445e518d6af739a77253491871c500b72c15cc682eeb075703422b651`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	15189 bytes

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