PDF malware analysis — malicious · d245a59c94af1d68

MALICIOUS

PDF

118.6 KB

MD5: 1368f686b7b1c6be7bf168fed1849355 SHA-1: 0700ff4e1e2b3c7feebf27abc6b55e3a2069769b SHA-256: d245a59c94af1d68845db45f45fe63f2376416b96a7fca94dfa1e8b9e1b038cd

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a large, comment-padded eval stager. This indicates the script is designed to obfuscate its true functionality, which is typical for malware attempting to download and execute further stages. The ClamAV detection as 'Pdf.Exploit.Agent-36086' further supports its malicious nature. The presence of JavaScript actions and eval calls points to T1059.005 (Visual Basic) and T1059.001 (PowerShell) as likely execution vectors, and T1204.002 (Malicious File) for the initial delivery.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `09ae9231f2e2c2bcfabc0fd0ca997530a62d409570202ae4aab7276f5fbd9efd`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627171 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

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