PDF malware analysis — malicious · c530e3bd48d5c57f

MALICIOUS

PDF

1.1 KB

MD5: 8681f2ba8d6919cf0abe4b8bf0cc2101 SHA-1: 0fe983fed3627cfbe11c79293db02fccceceb29f SHA-256: c530e3bd48d5c57f189b5bccc60703dccced3f2e16faa7102fb85901bf9d0dd3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode() for obfuscation, a common technique for executing malicious code. This script is likely designed to download and execute a second-stage payload, although the exact mechanism cannot be fully determined due to obfuscation. The file is classified as malicious based on these findings.

Heuristics 5

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_obj0005_000.js` `ae5d494f2483173554ce52b33aee3681783be912886265e4d703a085f2cac507`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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