PDF malware analysis — malicious · 97a2da02e2280034

MALICIOUS

PDF

40.0 KB

MD5: 0f9c54e42192130ffb8494de741f7c68 SHA-1: 75e6e2905c328a290597c29a348dcb3cd4cdb451 SHA-256: 97a2da02e2280034711b0e5c49f92ef74d92789815d6514d0e238af6a84d4836

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection of 'Win.Trojan.Agent-36169' on both the initial file and an extracted artifact 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 malware delivery.

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` `40a950c43cf9413785346ddca75870f8527779776f93303689a3d550391a2720`	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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