PDF malware analysis — malicious · e53c1b2778314a34

MALICIOUS

PDF

2.6 KB

MD5: d1481078d05917e11501b7e2aa7f94de SHA-1: 5627f621f434ac3451f5eaa67eba0ec775b79c8d SHA-256: e53c1b2778314a34752fc84fe7a9d49f3603c650aee7db2eccb84755e27b676e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution: JavaScript T1204.002 Malicious Link: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call and String.fromCharCode() within the decoded streams suggests that the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The obfuscation indicators further support 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` `54413bcb3a0cbf4676b4e7a5fc206fcb6d2da588b7379b92dba09c442334805f`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2595 bytes
`javascript_obj111712_001.js` `b0a29d7ed5fa361f8f590196f479902a00def01b9da51e94ea8ec8dc62fef59d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x89D	525 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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