PDF malware analysis — malicious · 4c8986e29ea03b90

MALICIOUS

PDF

6.6 KB

MD5: aa28d39c0f62b417f2c950aface9ce76 SHA-1: 99401b660ea410f82d0367b2b263518e7d02b68e SHA-256: 4c8986e29ea03b9040451e92674f48528e94b86560e5750fa3f9b379b163a56e

86 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. The ClamAV detection 'Pdf.Exploit.Agent-36086' strongly suggests a known exploit. The embedded JavaScript, named 'javascript_obj0006_000.js', is the primary artifact, and its presence points to an attack pattern involving the execution of malicious code upon opening the PDF. The exact behavior of the script is not fully discernible due to potential obfuscation, but its presence is a critical indicator of malicious intent, likely to download and execute a further payload.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
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_obj0006_000.js` `126cee13bf878c014c25d50bf46c472f39eef5f2b2b345513d887734b6d00f75`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	137518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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