PDF malware analysis — malicious · bd07aeee712c4363

MALICIOUS

PDF

4.1 KB

MD5: 73fef3d62d2b93d3a66f1d7ebce11946 SHA-1: 413ab27f4fd37a2910241dc3403a976c6cef3d94 SHA-256: bd07aeee712c43639331044bf128286fa51dadd6edd5bca4f45416208facfa86

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, with heuristics indicating the use of eval() and String.fromCharCode, suggesting obfuscation. The extracted JavaScript files, particularly 'acroform_b64_00.js', are likely responsible for downloading and executing a secondary payload. The presence of these obfuscated scripts points to a common delivery mechanism for malware.

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` `e41112c4ed20ffdd47f9eba41aaee87237ba8fbc086cb179f88815931949329a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6353 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` `84955ef797446c24b03f284bbea1eb76a46dc8d951f73a6a791df02d8a29cfd0`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3612 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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