PDF malware analysis — malicious · d42fa1f18261ca04

MALICIOUS

PDF

4.0 KB

MD5: 011cc4b395ccb4b286e80f9198896038 SHA-1: 7fe5872be3a4e53c353079288fcaea667383a69a SHA-256: d42fa1f18261ca0413a2cbe2a311b47dba41ee81ea283fcea11955ff96adba3a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The `eval()` call and `String.fromCharCode` usage within the JavaScript streams suggest obfuscation and dynamic code execution. The extracted JavaScript files, `acroform_b64_00.js` and `javascript_obj0013_001.js`, are suspicious artifacts. The primary function of the embedded script appears to be downloading and executing a second-stage payload, although the exact URL or execution method is not directly extractable from the provided evidence.

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_obj0013_001.js` `2d29092252680eabb65a0473b7ac1571f8ea09812405f77094f0e7242ec50852`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6229 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `46481da9436c118393b94ca2594a4d7d5326d8da68913a9a043d05dcce8e12ee`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.