PDF malware analysis — malicious · 44f591cfc6e37468

MALICIOUS

PDF

118.6 KB

MD5: ca26b3b5f185f06b5d0368b1587ea5e8 SHA-1: 69347e7394c96f089fed3412e2b6d9fdfb2bb04d SHA-256: 44f591cfc6e37468e555c4c275108089a2f0f275c2147b63853a1fc060a90ae7

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, as indicated by multiple PDF-specific heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_JS_LARGE_COMMENT_PADDED_EVAL'. The JavaScript stream, identified as 'javascript_obj0006_000.js', is heavily obfuscated and utilizes 'eval()' calls, suggesting it is a stager for downloading and executing a secondary payload. The 'CLAMAV_DETECTION' rule further confirms its malicious nature, classifying it as 'Pdf.Exploit.Agent-36086'.

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` `302b9af2cdba63000c56da02032e9043beb42dcdbd41177015461d03a325fdc8`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627089 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).

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