PDF malware analysis — malicious · e89d92b4f1ed42ee

MALICIOUS

PDF

1.9 KB

MD5: 70a60d85765bc2bebc681b2c6b380316 SHA-1: 202d421eb830184d8f31658cf2f7256653ca69f6 SHA-256: e89d92b4f1ed42eedb5db8bc674089803da5926f7d71e07e220892cbb2676e92

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

The PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating obfuscation and likely malicious intent. ClamAV detected this as 'Pdf.Exploit.Agent-35930'. The primary function of the embedded script appears to be downloading and executing a second-stage payload, a common technique for 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 0x663	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` `e7fd4e5192e2ac44ae60a048dce8f42f49875f1e8422627249148f2b8d02ab03`	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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