PDF malware analysis — malicious · 945efb80b7ff3889

MALICIOUS

PDF

3.5 KB

MD5: 37f10f95108148698ece9a40ab1205ef SHA-1: 2e212b24275b388d5cd6588303fcaaa96e00bc2a SHA-256: 945efb80b7ff3889e1f4aeae22b4da47f186866ea4a19ecd0fee67ddc94e7e9c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL and PDF_FROMCHARCODE rule firing suggests the JavaScript is obfuscated and uses dynamic code execution. ClamAV detection as 'Pdf.Exploit.Agent-20561' strongly suggests a known exploit is present. The embedded JavaScript is likely designed to download and execute a second-stage payload, a common technique for PDF-based malware delivery.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-20561 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-20561
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj248136_000.js` `da7fbed18439537766daaf9f60aa2d3904700995683a2219586ee0dbeb3644ec`	pdf-javascript-stream	PDF /JS object 248136 at offset 0x134	5740 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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