PDF malware analysis — malicious · 590ddb5895586a7a

MALICIOUS

PDF

1.51 MB First seen: 2026-05-13

MD5: 6fdbe232ef39fc2b3e0c096b5e736785 SHA-1: 542cffd17147bd1a83952649d6ad0a0e8c8d537a SHA-256: 590ddb5895586a7a3beda1fd5c5b5d70b38babb2a55a5a4e8b5bfdcd530faedc

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that is configured to launch an embedded file upon opening. This JavaScript is likely responsible for downloading and executing a second-stage payload. The presence of an embedded file and JavaScript action strongly suggests a dropper or downloader functionality.

Machine Learning

Nyx PDF Classifier clean score 0.0147

Heuristics 6

JavaScript action low 2 related findings 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)
exportDataObject + nLaunch — embedded-file launch-on-open dropper critical PDF_JS_EXPORT_LAUNCH_DROPPER

PDF JavaScript calls exportDataObject() with nLaunch set, which extracts the document's embedded file and launches it in its default application. This is a launch-on-open dropper: the embedded file is the payload. No benign workflow auto-launches an extracted PDF attachment. (matched in decompressed 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)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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
`embedded_file_obj0049.bin`	pdf-embedded-file	PDF EmbeddedFile object 49 at offset 0x12DC2C	346624 bytes
SHA-256: `44b0501d3ea6199340ef61c0b5152e626d548b78d220cf8908795516612cbe10`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`stream_036_off001827b3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1827B3	1688 bytes
SHA-256: `75207a5ce2e25f9b3c0e5440f93fdfe5f3c0f5c00712ea8acf77aa8c30695cee`

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