PDF malware analysis — malicious · b72e7970ae442583

MALICIOUS

PDF

2.9 KB

MD5: e07d634ecf28ace9ccce58a463efa87f SHA-1: b1aae32465a4e1ed6f320d978322c699e7ead371 SHA-256: b72e7970ae442583b9b4ed49a2d92cb2251b9d9a3ead46205a6389630be0b06f

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is commonly used in malicious PDFs to download and execute further stages. The presence of JavaScript actions and embedded JS streams, along with the 'Pdf.Dropper.Agent-7216759-0' ClamAV detection, strongly suggests a dropper functionality. The extracted artifact 'javascript_obj0009_000.js' is likely the component responsible for this payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7216759-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7216759-0
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `91e8537bec98a97fb168d17db5e484ea70424b8a600ea4b3a12e1dad74a708be`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	20465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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