PDF malware analysis — malicious · da86fc69e418c1c3

MALICIOUS

PDF

5.1 KB

MD5: 191c05ec3992d133339ac23817c8304b SHA-1: f7d8167c5f38fcd5421264761e399f274c449796 SHA-256: da86fc69e418c1c391fba0b796460ebb2ec43770fa8d6b5339398b15224b25f5

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings, along with the 'Script obfuscation indicators' from static triage, suggest that the JavaScript is heavily obfuscated and likely attempts to execute arbitrary code. This is further supported by the presence of an extracted JavaScript file named 'javascript_obj54279_000.js'. The primary intent appears to be downloading and executing a second-stage payload, though the exact nature of the payload cannot be determined due to obfuscation.

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_obj54279_000.js` `fbccf45ca0ba14c83232146a29b59fb0ca2f7b041b530ca1e7222aca226f7692`	pdf-javascript-stream	PDF /JS object 54279 at offset 0x135	8372 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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