PDF malware analysis — malicious · 42890b76bf0c9b60

MALICIOUS

PDF

2.9 KB

MD5: 7309c2f155e97e89996a8af042f4358f SHA-1: a8ec9e815831a4813e02b11929052536635911cc SHA-256: 42890b76bf0c9b60e10ad6234425748b6f7561c9d35fdf40a6e9ea673b1c525f

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits multiple indicators of malicious JavaScript, including the use of String.fromCharCode and embedded JS streams. ClamAV detection as 'Pdf.Dropper.Agent-7254751-0' strongly suggests its role as a dropper. While the specific JavaScript payload is obfuscated, its presence and the dropper signature indicate an intent to download and execute further malicious content.

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7254751-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7254751-0
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` `bd471ee35b3e4b337307d0fc1ad5100cf7b9b3a785d16415545f5b1a45f2239b`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	20105 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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