PDF malware analysis — malicious · 1c93405a77aea0ea

MALICIOUS

PDF

16.5 KB Created: 2007-12-35 21:45:26 Authoring application: Adobe

MD5: 1b4b2879b2a2790ae072d22cddc43e58 SHA-1: e7316dae19157513eff5a711a8caf99a75abbd44 SHA-256: 1c93405a77aea0ea8ed0f12d09f2dc12e83b57e87acc320e61f4e2db4214ab25

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, with high-confidence heuristics indicating the use of eval() and ML classification flagging it as malicious. ClamAV also detected it as 'Pdf.Dropper.Agent-7236096-0'. The embedded JavaScript streams, particularly 'javascript_obj0036_002.js', are suspicious and likely responsible for downloading and executing a second-stage payload. The exact nature of the payload is not discernible from the provided evidence, but the dropper functionality is clear.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7236096-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7236096-0
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `98f837067e8e657d6b66593e86ceb7ffeccf7b1714df899dd1e4b0af6f982bd9`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3A8	1525653 bytes
`javascript_obj0034_001.js` `d797de515dac4f8369b71edf86d0fc9aa8fe1224d8f9d3f1eea8a19a1f23bfc7`	pdf-javascript-stream	PDF /JS object 34 at offset 0x3F16	332 bytes
`javascript_obj0036_002.js` `351349db1f2c462951d107c63f395d2e3d546cbac252089bc55d7cd7501a396b`	pdf-javascript-stream	PDF /JS object 36 at offset 0x80	426 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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