PDF malware analysis — malicious · 35051314330e4f09

MALICIOUS

PDF

118.5 KB

MD5: 7996ff16aeae617637379677d0fdea93 SHA-1: 51bcbeeeba907a72b5ef6d184c9b9e6016215d10 SHA-256: 35051314330e4f095f696e3f32e748f5433408cf330f45e602c26bfcafbd6fbd

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple high-severity heuristic firings related to JavaScript execution, including `eval()` calls and a large comment-padded JavaScript eval stager. ClamAV also detected this file as 'Pdf.Exploit.Agent-36086'. The embedded JavaScript stream, while obfuscated, strongly suggests a downloader or stager functionality, likely intended to fetch and execute further malicious content. The presence of `String.fromCharCode` and `eval()` within the JavaScript stream indicates dynamic code construction and execution, a common technique for malware 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `90a98eb094e0ed37bdc90faac0dc3484d43f44ffd783d8e0def8035d278cf6a7`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626055 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_off0001d68d.bin` `130677bf88c9c7fb777bd1e17188755599633adcf067165902aea18f81bee617`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D68D	300 bytes

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