PDF malware analysis — malicious · e6c55ab54ffaaa14

MALICIOUS

PDF

4.1 KB

MD5: 5b4477b30bf82a21ae16767f7e4157b7 SHA-1: 7a34ef614ea498aa103bedc9a1e1a626bb2cbb50 SHA-256: e6c55ab54ffaaa14bbac6feee66e2a873b995829d41ea8e070305d00a570c4b8

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 presence of PDF_EVAL and PDF_FROMCHARCODE rules suggests that the JavaScript is obfuscated and uses dynamic code execution. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are likely responsible for downloading and executing a secondary payload. The obfuscation and use of eval() are common techniques for evading detection.

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` `eb8d9b81a91aa75fa03927a7fd1e7ff68f0350af067bdc3272d518f79f197025`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6413 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` `3ba415f955d0da5b5a6c1db9c4d289488ab13160d970e7aab4887bae5a6c739c`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3655 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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