PDF malware analysis — malicious · 8f2d3579fb52c3fc

MALICIOUS

PDF

4.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: 740bd58ea1563d4de159fea5fc3fa258 SHA-1: 327967238ac638bcd95a59b2bdc80d5075853f03 SHA-256: 8f2d3579fb52c3fc9daf114158708b3322964ec47ea4781b80568f7728b49f1f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'eval()' call and 'String.fromCharCode' usage suggest obfuscated code execution. The ClamAV detection 'Pdf.Dropper.Agent-7282067-0' and the presence of a suspicious JavaScript file ('javascript_obj0006_000.js') strongly suggest this PDF acts as a dropper. The embedded script likely downloads and executes a second-stage payload.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7282067-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7282067-0
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_obj0006_000.js` `5db8014c802af381454e938f428400f5c30d86873d310f39b113c0ca70cc4542`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	29433 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).

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