PDF malware analysis — malicious · 8a0eb480db00f1d3

MALICIOUS

PDF

2.6 KB

MD5: 97cf62191b89a012282400f2e2485210 SHA-1: d320061d55e5f83e1c63c24c56836013c9f3e9ce SHA-256: 8a0eb480db00f1d344e9269a013424a0cd060c02b2faa0c3b1031a6e2661b0b6

126 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 including PDF_JAVASCRIPT and PDF_JS. A critical finding is the PDF_EVAL heuristic, suggesting the execution of arbitrary code via an eval() call within the JavaScript. The presence of String.fromCharCode() further points to obfuscation techniques commonly used to hide malicious payloads. While the specific payload is not directly visible, the combination of these indicators strongly suggests the PDF is designed to exploit a vulnerability and download/execute a secondary malicious file. The ClamAV detection 'Pdf.Exploit.Agent-13969' corroborates this assessment.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-13969 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13969
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `5bdb7a1d6cc913f16e928cff1cb85c3094dad965ee3adb9a296d87e7ec60f60f`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2420 bytes
`javascript_obj111712_001.js` `d930752a68866281b864c3236bdc601198a65cafe9bbdc10a90f53d79b2dd5f3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x852	511 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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