PDF malware analysis — malicious · 1d65cea07794d531

MALICIOUS

PDF

4.0 KB

MD5: 9f665630e77b0248ab2eae25278b49c5 SHA-1: 4bfbff0a7da8890b6563bfa64b6b736423054489 SHA-256: 1d65cea07794d531e6d274dbc958ebf0b7ca6ef2f8df90d223470d0e316ce525

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including calls to eval() and String.fromCharCode(), which are indicative of obfuscation. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary function of the embedded JavaScript appears to be downloading and executing a second-stage payload, as suggested by the 'Pdf.Dropper.Agent-1828651' ClamAV detection name. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1828651 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828651
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` `38bd0cd6ebf746e4d0d5c99ea79f007790cc61e0b3652f870a8a1f2a30c24ab1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6241 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` `491e0ad911f849d350342c66204094dcc5e30e8b3c114dc66e67a31e15c9a964`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3527 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.