PDF malware analysis — malicious · cc5fe46c8a4f1b8b

MALICIOUS

PDF

4.0 KB

MD5: 8a9686d0aca67b308e4d79ab3bac577f SHA-1: ece6b285a48f0868f4df4447774ffe561054dd0e SHA-256: cc5fe46c8a4f1b8b0ffa87eb5033bc965a8466790513e6c58d75997b37b908ef

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 JavaScript stream exhibits obfuscation and uses eval() and String.fromCharCode(), suggesting it's designed to execute arbitrary code. The presence of 'acroform_b64_00.js' and 'javascript_obj0013_001.js' as extracted artifacts further supports this. The primary function of the script appears to be downloading and executing a second-stage payload, though the exact nature of the payload cannot be determined from the provided evidence.

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` `bb22d3cc4500fa8b6f7cb983821a771d7b39f084b3a3698c1edd9e097a7d494a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6229 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` `65b5790217657644f75cdd4f8bc0083f34998b4440f16997dd8a92655ec30277`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3519 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.