PDF malware analysis — malicious · 8b6ca0419318e21a

MALICIOUS

PDF

27.7 KB

MD5: 1dcedde1e95efd26e9638c05a5b4009d SHA-1: 62402da79781b9d986172f8a9d4d925b46c9e99e SHA-256: 8b6ca0419318e21a5b3a0c49abcda6b04b4277c5cc85b9a55104938875dc133a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. ClamAV detections confirm the malicious nature, identifying it as Win.Trojan.Agent-36100. The embedded JavaScript is likely responsible for downloading and executing 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` `5132b301a06301bde329b028e8312f3cd59d4f9f44763a25aca40afea95c51d5`	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` `10a21f5bef13e6f26cfc2b70a02e755b3a6f83fad8a141b68d1a42cff83bff2f`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	15189 bytes

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