PDF malware analysis — malicious · 3fe6fbb58b5205dc

MALICIOUS

PDF

118.5 KB

MD5: 023521d29e9705255d7ca1258e50fc90 SHA-1: b1cea70a4e811eade2270bc9cb9d3d64b5f55a91 SHA-256: 3fe6fbb58b5205dcbac83907814ab48fc68c4cd52fba9356d665dba90c4e4967

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 deobfuscate and execute arbitrary code. The ClamAV detection 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The primary attack pattern involves leveraging JavaScript within the PDF to download and execute a second-stage payload, as suggested by the heuristic firings related to JavaScript execution and eval calls.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `32fc14b286708faf7401a95c7ec68ce4cb5d9f579a50a89288aed842d34bc859`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626620 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).
`stream_002_off0001d839.bin` `8f1e6f176cbf8f550d371e3f9338ddddf73b4da1aedaa552fb9f6f7aaa8b7d0a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D839	200 bytes

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