PDF malware analysis — malicious · d1781dfda6736968

MALICIOUS

PDF

4.1 KB

MD5: 70ff8a2e533caa8412dda4e4f2a81fe8 SHA-1: fa11ea8bf593cec492b49d345c3ae5a228170c50 SHA-256: d1781dfda67369680b7298c21983bd1390a851a5a59a0864cb02a44ef1dea7a3

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, PDF_JS, and PDF_EVAL. The critical ClamAV detection of 'Pdf.Dropper.Agent-7307077-0' strongly suggests a dropper functionality. The presence of obfuscated JavaScript streams and the 'eval()' call point towards the execution of malicious code, likely to download and execute a secondary payload. No specific family could be identified, but the dropper behavior is clear.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7307077-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7307077-0
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` `fd1bc938b4b22b17daea0c77d2b23478c9bb81799b57a6753816311a4091a4e2`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6337 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` `e69716708e0e26d9181bac707b30e3f29e35b22e5654b908b40916a75b56fbe5`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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