PDF malware analysis — malicious · 9be8b01bd3454229

MALICIOUS

PDF

1.6 KB

MD5: cca46040a975bea6e4c9ecbd9ae37c31 SHA-1: 49fbbbe1c61833df59850e660f5ddeb9fd7679aa SHA-256: 9be8b01bd34542291454c70b015f56167ada40d33107fd0c7a8692dd76ad925b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded and obfuscated JavaScript, as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL heuristics. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The JavaScript stream, named 'javascript_obj0009_000.js', likely contains code to download and execute a second-stage payload. The use of eval() and String.fromCharCode() suggests attempts to deobfuscate and run malicious code.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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. (matched inside decoded stream)
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_obj0009_000.js` `425716ee2192bee15de0381e46a26e6b0cb27347ca9f7e08938dd0f91d11e036`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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