PDF malware analysis — malicious · 57195558619671a4

MALICIOUS

PDF

13.3 KB

MD5: e9caad897c94bc5a5d933b9639ef85d6 SHA-1: a074674eb527b9f10a1297bb111af15a0fa0c384 SHA-256: 57195558619671a47b42014c3a8ee47440c61c712b0e266de07e337925e0c108

194 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits multiple high-severity heuristic firings related to JavaScript execution, including eval() and unescape() calls, and is flagged by a machine learning classifier as malicious. ClamAV also detects it as Pdf.Dropper.Agent-7213157-0. The embedded JavaScript streams, named javascript_obj0116_000.js and javascript_obj0123_002.js, are likely responsible for downloading and executing a second-stage payload. The obfuscation and use of eval() suggest an attempt to hide malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7213157-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7213157-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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_obj0116_000.js` `55cd71b7a90832f21b5794884ae71afc6caa3dab28574f0b954ea23882861b87`	pdf-javascript-stream	PDF /JS object 116 at offset 0x4BB	40106 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 199 eval/decoder/string-building token(s).
`javascript_obj0123_002.js` `e99b04d755bde1cef20eb9186db0e4e77df1db725929f101aa944fdd7999cfd3`	pdf-javascript-stream	PDF /JS object 123 at offset 0x386	12683 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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