PDF malware analysis — malicious · c184c27a07cbdf19

MALICIOUS

PDF

4.1 KB

MD5: 4281bce975c0df92e97ead640bd3c612 SHA-1: 5526dd6d21e0e9333d9da7c1585890a9d39a766e SHA-256: c184c27a07cbdf19a97955430924479f85cbce791a5864cef0c494cf5351a838

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a call to eval() and String.fromCharCode, indicating obfuscated code execution. The ClamAV detection 'Pdf.Dropper.Agent-7217606-0' strongly suggests a dropper functionality. The extracted JavaScript files, particularly 'acroform_b64_00.js', likely contain the malicious script responsible for downloading and executing a second-stage payload.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7217606-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7217606-0
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` `8d81ea719a776a668d73fc9995ecda606b5e6e002ff99c8fdfaa9cf562a1d456`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6373 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` `a7a0c854088c38104be6050e48f4af7472ce2b54e9a82bab95ebca4eca89ee38`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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