PDF malware analysis — malicious · 3e0423820762941e

MALICIOUS

PDF

4.0 KB

MD5: 6ade84376c7cde5b8be91228b3a47f56 SHA-1: b67b7c94bd974eebea2ea91de1aa5e8f2aeda2c2 SHA-256: 3e0423820762941e372f312084c8bbaee3949dfce45409ec1961d6c0b6634fa9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical ClamAV detection of 'Pdf.Dropper.Agent-7252572-0' strongly suggests a dropper functionality. The presence of eval() and String.fromCharCode in the JavaScript stream points to obfuscation techniques commonly used to hide malicious code, likely for downloading and executing a secondary payload. The extracted JavaScript files, 'javascript_obj0013_001.js' and 'acroform_b64_00.js', further support this analysis.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7252572-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7252572-0
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0013_001.js` `105086b09ce096838d378d973d44cd2cc5a66e8a3c93ca61ec044da84dbe0015`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6237 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `225e22186af53ad217d1b94d98b224070396b19265d7ed1321fb400487282324`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3523 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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