PDF malware analysis — malicious · d0bd0a27107fa118

MALICIOUS

PDF

11.0 KB Authoring application: Recommend intelex is basically all honest dice he wanted to.

MD5: 1aaf9166bc19d48577c051aa590a5ef5 SHA-1: 1f75c38a7c80f7a8b2bc60535b673bb6c1803c22 SHA-256: d0bd0a27107fa118c4ca1224309fefb434f296c092bfad7d457a084283e4258d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript stream, named 'javascript_obj0018_000.js', is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The document body text appears to be largely corrupted or irrelevant, providing no clear user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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. (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_obj0018_000.js` `b5d4332cf1ca9d9fad4db1d6f2e2298d0e8186bddc91a2430b49ba0ee36ea6f5`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	163353 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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