PDF malware analysis — malicious · 216b86f82a48a5ce

MALICIOUS

PDF

5.1 KB

MD5: 776a169ccd9657c06749116dee46ecab SHA-1: f39c2d429f0f176a96a5f603f61834f40a0f0bc9 SHA-256: 216b86f82a48a5cebc9496e3ec793501b3229295d2b1f87e9c1d2c173adcf94d

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 PDF_EVAL heuristic firing suggests that the JavaScript is obfuscated and uses `eval()` to execute code. The presence of `String.fromCharCode` further supports obfuscation. The extracted artifact `javascript_obj1859_000.js` is likely the source of this obfuscated JavaScript. The primary intent appears to be code execution, probably to download and run a secondary payload, which is a common technique for malware delivery.

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_obj1859_000.js` `0004356e8908f43eae950b3f32a19219113075996ffde62886680e6137c60b27`	pdf-javascript-stream	PDF /JS object 1859 at offset 0x135	8387 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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