PDF malware analysis — malicious · bf948405f13be6da

MALICIOUS

PDF

3.2 KB

MD5: b174f7e6107c38f8aeba1f50368228fc SHA-1: 1a38a981dc6902ff02f987cc2c58ebcd3df7e7bb SHA-256: bf948405f13be6da67dcfbe5b55ac0699976ff122bfea33d5049f5c7ee8526b4

118 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Phishing: Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, which is obfuscated and uses an unescape() function, as indicated by multiple heuristic firings. ClamAV also flagged this as a suspicious PDF. The embedded JavaScript is the primary indicator of malicious activity, likely serving as a downloader or initial execution vector for a secondary payload.

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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` `b1fa3cd906e9af37d7044084c27e6d3dd714e2b81a0b243681e1f2ac64b16d89`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AA	1953 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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