PDF malware analysis — malicious · 751f113922db261c

MALICIOUS

PDF

16.6 KB Created: 2010-03-12 12:19:01 Authoring application: TV4t8qG9GU (via k8C4Kbjhos8Uk)

MD5: df3269b79a86ef753d9bb002df60b126 SHA-1: f35997ea51a1c0e5f933d27402ef5aa00f44ddf6 SHA-256: 751f113922db261ceba321ec7db3f320b00ed1faa813ed7d1a1a519edb2ade3d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier also strongly indicates maliciousness. No specific family could be identified, and the JavaScript itself was too obfuscated to reconstruct specific commands or URLs.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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_obj0007_000.js` `a1a2728e0138cd082fc1fb633daea83dbc846b3c1453ea98302f01ce65a79f82`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23E	15772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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