PDF malware analysis — malicious · 58e4fd29aca7f36d

MALICIOUS

PDF

15.8 KB

MD5: 9adba9de415b4a9616548a7addba6427 SHA-1: 2d91d73ec4879605c17406f4c7815d2b18e3f841 SHA-256: 58e4fd29aca7f36df23e800704f9b66c9810758c689f5d670cae9fe32f181f04

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, including a large comment-padded eval stager. This indicates the file is designed to execute malicious code upon opening. The presence of `eval()` and `String.fromCharCode` within the JavaScript stream strongly suggests code obfuscation and dynamic execution, typical of a downloader or exploit loader. ClamAV detection as 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The primary attack pattern involves exploiting PDF vulnerabilities to run arbitrary code.

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` `5b310c74c75871158d17053a4458485c1b2563a972a6a34eb82b4164bd0f3b66`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425764 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_off00003d3f.bin` `c0a48caf245daf3ba6c1aa1bf106a004b810628455d3fea9c326ada5163f9aa2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3D3F	200 bytes

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