PDF malware analysis — malicious · ad331dd22b69d4d8

MALICIOUS

PDF

1.9 KB

MD5: bcde303a49a85d679b62495f59a6f0de SHA-1: 5b1eda3a1f5f2138695364d7c0d0ad7ce4e5ab63 SHA-256: ad331dd22b69d4d88d8d7759c315606fa96010dce34903e61da179062f0529e8

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is obfuscated using eval() and unescape() functions. This JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code. The ClamAV detection 'Pdf.Exploit.Agent-35930' further confirms its malicious nature. The primary attack pattern involves leveraging PDF vulnerabilities to deliver and execute malicious scripts.

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 0x666	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` `669b6264289eb15f615e057481a3de17a3f299161e60f8490e963472eda2ef87`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2810 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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