PDF malware analysis — malicious · 8d496daa1095e901

MALICIOUS

PDF

4.0 KB

MD5: 500ebd85e6ba771242444495b2d90c57 SHA-1: ff5d70c9e69da7ebdf537691d09f3eb4afaf1f66 SHA-256: 8d496daa1095e9017856ebb82fd0d3a72a2e8376ff48d714e9011bd2bfe2809e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and likely used to download and execute a second-stage payload. The ClamAV detection of 'Pdf.Dropper.Agent-7281190-0' further confirms its malicious nature as a dropper. No specific family could be identified, but the techniques used are common for PDF-based malware delivery.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7281190-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7281190-0
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` `8c59408f3ad3d4706fadd5b8c0e7161f6b5f62890adf13e374e2515765b1a72e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6333 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` `c2e30866a587c3634d9e5cc1c01afc22a6a756b60c967d3378ee9a2cb968d4b5`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3595 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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