PDF malware analysis — malicious · b8c25da042b3bee6

MALICIOUS

PDF

2.7 KB

MD5: 89e6eab1e4fe553b422e8b8bb6262e33 SHA-1: 158924dc6e9d3e001578551a1d515fe976aa636d SHA-256: b8c25da042b3bee6a6c07889507509ebb9347fd9d216997d47cffdcef0964ae7

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream utilizes `eval()` and `String.fromCharCode`, suggesting an attempt to obfuscate malicious code. This code is likely designed to download and execute a second-stage payload, a common technique for initial access. The extracted file `javascript_obj111712_001.js` contains obfuscated JavaScript, further supporting this assessment.

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_obj111711_000.js` `b45cbe3522830ab5950c2cce5e4195d28db709a15f368f5ef612efc724a59cdb`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2596 bytes
`javascript_obj111712_001.js` `60da17ecf51dde45c912f4b6787e29ef60da3c6441c0532387b5b89fe8682689`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x8E0	524 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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