PDF malware analysis — malicious · e4c4a971738b0eca

MALICIOUS

PDF

8.1 KB

MD5: bbc46f90358c731458a4378dbb3f592c SHA-1: e050a58b680019fb7d4b18f2c3c133d28b0137d6 SHA-256: e4c4a971738b0eca16f250ca5fe64de1c30c373a197883d862dbd5710a2a7d81

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage suggest obfuscated code execution. While no specific URLs or network indicators were extracted, the presence of eval() and JavaScript within a PDF strongly suggests an attempt to download and execute a secondary payload or exploit a vulnerability. The obfuscation makes it difficult to determine the exact intent without further dynamic analysis.

Machine Learning

Nyx PDF Classifier suspicious score 0.3812

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00000650.bin` `6c0612e7fcc655de6cd18b8b8c7c104f000b6ebf7a6f89d61cf9fc57bb9377e8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x650	3002 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`objstm_0023_00.bin` `45bc3e1858552e1ed83b6a9a130d10d2ec3239fa8675900b570f071943f5f8d2`	pdf-objstm-decoded	PDF /ObjStm 23 0 obj (inflated)	325 bytes

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