PDF malware analysis — malicious · 9c973c00ca635bd8

MALICIOUS

PDF

6.2 KB

MD5: 38ee14e48889809b3d6b76b3d2ca3172 SHA-1: 6ccaf09281f818532b6849bdcfe32d6c354545cf SHA-256: 9c973c00ca635bd8b2ecd98f7ed1f3a9a15d9360695d5dac9cb1da89b4662b9c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call within the JavaScript stream suggests the execution of obfuscated or dynamically generated code. While no specific URLs were flagged as malicious, the presence of a suspicious extracted artifact (objstm_0023_00.bin) and the JavaScript execution point towards a downloader or exploit delivery mechanism. The benign URLs present do not detract from the malicious nature indicated by the JavaScript.

Heuristics 6

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. (matched inside decoded stream)
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. (matched inside decoded stream)
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objstm_0023_00.bin` `5cdd791484722b2925b3cba2a8e08d0e69776059f3544a78c553107d9fe6966d`	pdf-objstm-decoded	PDF /ObjStm 23 0 obj (inflated)	619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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