PDF malware analysis — malicious · 1ed3860da653f752

MALICIOUS

PDF

3.8 KB

MD5: 1cad9af60c6f2e8165ec794ccd0ce0a1 SHA-1: 3d074b1d3580c3c5e2f94480d5c6aa281e96253f SHA-256: 1ed3860da653f7525aa005b1ab13cccc3307faefb5d785f0ed698f132e9ee392

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, with one stream exhibiting eval() calls and String.fromCharCode usage, indicating obfuscation. The presence of these JavaScript actions strongly suggests the PDF is designed to execute malicious code. The obfuscated nature of the script prevents a definitive analysis of its exact payload, but the techniques used are common for downloading and executing further stages. No specific family could be identified due to the obfuscation and lack of clear indicators.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `6b378b7437141017b0bf2105ddbf473d920a2acbd45088543a89a76cef8bf58b`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `e39d582e35406f0397399bd25fb02623a7e056b3730c3c68dcf892cb40e0c39d`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	5581 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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