PDF malware analysis — malicious · 8056309950fa2b4e

MALICIOUS

PDF

4.1 KB

MD5: a983efa98b1713f2aa262c25b11a333f SHA-1: 8a58f392654ead86bcabdd80ea4c74c45de47e86 SHA-256: 8056309950fa2b4ef4e46d550d34b49f13dcdeaa76d720dec1e4a5682f2446a0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a critical PDF_EVAL heuristic and String.fromCharCode usage suggests the JavaScript is obfuscated and intended to be executed. ClamAV detection as 'Pdf.Exploit.Agent-15333' further confirms its malicious nature. The extracted JavaScript files, particularly 'acroform_b64_00.js', likely contain the exploit code responsible for the malicious behavior.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-15333 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-15333
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` `7cdec1d8303ad10e5c9d1c0713819fb4abee75a70a8de18868f68eebcebc9866`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6373 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` `0171a92f89105de32884f2419097fe151ae3622cd3013bfe7fd1b7ea02848713`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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