PDF malware analysis — malicious · 7937da20290a38db

MALICIOUS

PDF

1.9 KB

MD5: 89a995c3be6dd965f669e71793a4212d SHA-1: 26f914307ef7d64c70223f04081751a710bdf8ea SHA-256: 7937da20290a38db3568cfd96dad200f9079c2ccecdb506ed674dc4c687ca79b

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The ClamAV detection 'Pdf.Exploit.Agent-35930' strongly suggests a known PDF exploit. The embedded JavaScript, particularly the use of eval() and unescape(), points to obfuscation techniques commonly used to hide malicious code. This code is likely designed to download and execute a secondary payload, a typical pattern for PDF-based malware delivery.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x664	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `dc62918eb1ae11de30820dbddf177232f4905dc61a4c346903aa2ff554586dfe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2816 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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