PDF malware analysis — malicious · 5dca2f896b836177

MALICIOUS

PDF

16.9 KB

MD5: 075ee12c6abf5eb918cff87bdd6d4fc1 SHA-1: 7c22855bc2824a1b3a3f8047223fe60c78cf6e9d SHA-256: 5dca2f896b83617797bc0ec963d16e38432d31ba885f1521ea1c6c933c24d409

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics including ML and ClamAV. The JavaScript appears to be obfuscated but is designed to download and execute a second-stage payload, as indicated by the use of eval and string concatenation to construct executable code. The ML classifier's high confidence score further supports the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `942e42009bcf676d464b3457e6bee460f69c82bca9d4bb222b03414db649ef55`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	17971 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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