PDF malware analysis — malicious · 2c780bb7b77b1f15

MALICIOUS

PDF

2.5 KB

MD5: 80f1a1d242f49a5d08e1790c27b0a0fd SHA-1: e188be2ca7f78c2d45163d26bf4b1f3e84351a81 SHA-256: 2c780bb7b77b1f15fa0df837518277d503a05ff4baf50ba784767cc5e7d801ef

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting obfuscation and dynamic code execution. This script likely downloads and executes a second-stage payload, as evidenced by the 'Suspicious extracted artifact' heuristic. No specific family could be identified, and the document body was unreadable.

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_obj0005_000.js` `3bc7db205c65e6505f1b544d50839a9089ad12af20bc73e2c89b074c24582f28`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	7507 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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