PDF malware analysis — malicious · 2076d5228dd9770a

MALICIOUS

PDF

8.9 KB Created: 2009-08-31 20:54:23 Authoring application: fwhrIQZMVQDdfYh (via XfwNJVeFfqgWwOuGgPm)

MD5: 34537df3ad427c37bd37c401da4dd97a SHA-1: 0739201faf935968ba65babaade1a97b27ab926d SHA-256: 2076d5228dd9770a4095735544598cf00ed94f6877462f0a569fb6b1862b78aa

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a dropper. Heuristics indicate the presence of embedded JavaScript, which is often used to download and execute further malicious content. The extracted JavaScript file, though obfuscated, likely facilitates this payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-5342574-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5342574-0
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.
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_obj0007_000.js` `fbcbaeda741696e6cb49f10d8045719621d08433a0158ded35a28dc9e09f3b28`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3AE	7426 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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