PDF malware analysis — malicious · 57dfee5cf84f2ebf

MALICIOUS

PDF

61.1 KB

MD5: 90deeec2417ef52c5cb4c5498914423b SHA-1: 6e72a7fb0105cd3e6f4c440322b0cfa45a78ae7b SHA-256: 57dfee5cf84f2ebf0781f7a47d65797961557a50f45b5c854af7a03d9325633d

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_FROMCHARCODE. The embedded JavaScript stream, specifically 'javascript_obj0601_001.js', is likely responsible for executing malicious code. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file. The exact payload and execution method are not fully discernible due to obfuscation, leading to a lower confidence in family attribution.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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_obj0204_000.js` `060801d1a6efd0afca28721650f7391b17b215fa8693c3177509f15e441d0f1b`	pdf-javascript-stream	PDF /JS object 204 at offset 0x5A65	496 bytes
`javascript_obj0601_001.js` `2e5ca43259b99f6dea439266525aa9bcf31f6c5ed6ac26f152961112d6f08f41`	pdf-javascript-stream	PDF /JS object 601 at offset 0xC3BD	193 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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