PDF malware analysis — malicious · 49f43d28beed9710

MALICIOUS

PDF

118.8 KB

MD5: c7e8b20c0c6230e130e9f3ae942ec96b SHA-1: 9d8ddba07dc613399720cf569da027f7450565df SHA-256: 49f43d28beed971076671cc9d390a9daad5d7c61bb10c2696e6ff0c5df21938c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a high-severity 'eval()' call and a 'Large comment-padded JavaScript eval stager'. ClamAV detected this file as 'Pdf.Exploit.Agent-36086', indicating it's a known exploit. The JavaScript likely downloads and executes a second-stage payload, contributing to the malicious nature of the document.

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` `8db127e0f0127333306cd1a5efab714b749ce8928a91cbc9c9268799752a8715`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627523 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_001_off0001d7c3.bin` `238d490bc640b617302cf0b3e5386053a12f6291717550985b11d6b41703060a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D7C3	300 bytes

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