PDF malware analysis — malicious · d1ea35b62452f7a4

MALICIOUS

PDF

5.1 KB

MD5: b22023918ce2d37c5b0501709c059556 SHA-1: b4f75a79c93a40cd5415b305394e827530ab1fe5 SHA-256: d1ea35b62452f7a445887b0da61b6d6d97d8e95486c85ab347d4b5f6ff13d548

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream, named 'javascript_obj0007_000.js', exhibits obfuscation and uses eval() and String.fromCharCode(), common techniques for hiding malicious code. The primary function of this script appears to be downloading and executing a second-stage payload from a remote source, as suggested by the obfuscated code and the presence of JavaScript execution techniques. The extracted document body text is heavily obfuscated and does not provide clear user-facing content, but the overall behavior points to a malicious downloader.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_obj0007_000.js` `8e0ae10088653394a8e1c8a09cfa9f6e4019c089e711c4d865ed1be3bea71430`	pdf-javascript-stream	PDF /JS object 7 at offset 0x228	4469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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