PDF malware analysis — malicious · c2e6dea80958b72f

MALICIOUS

PDF

21.3 KB

MD5: 2b33fd4e2184f67ced45f541e333ae0c SHA-1: 13e8f334ad03fb88c3b711e297306c600f6f5d30 SHA-256: c2e6dea80958b72f9bd57130d5fba75f0c39c6e9d60396086d252cc247beff82

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, identified by 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, appears to be designed to download and execute a second-stage payload, as indicated by the heuristic firings and the nature of such embedded scripts in malicious PDFs. The DOC BODY content is highly obfuscated and does not provide clear user-facing text, but the presence of JavaScript and the ClamAV signature are sufficient indicators of malicious activity.

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` `981a231e7e55ab65b35cbcb07879c10fa386ca7774dc2f763ca8e21dc9c76f74`	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` `630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x9FE	1262 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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