PDF malware analysis — malicious · 4817a61bd4ded918

MALICIOUS

PDF

23.4 KB Authoring application: 3.0.2 (5.0.5)

MD5: 1e228375cfc233c9b0e7006feb5057f1 SHA-1: 2ed2489601982e8fea67eeb061930ab2f6f62f2e SHA-256: 4817a61bd4ded918158f8ef5888d0b4750955e3acf1a5cfc4246635210afea70

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. This script, found in stream_006_off0000571c.js, is likely responsible for executing malicious actions, such as downloading a second-stage payload or redirecting the user to a malicious website. The PDF's structure, being image-heavy and small in size, suggests it's designed as a lure to trick users into interacting with the embedded script.

Machine Learning

Nyx PDF Classifier suspicious score 0.4704

Heuristics 5

Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 23 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
Suspicious extracted artifact medium 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.
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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0000571c.js` `2b4b5227efd3e0795d674f4dd97d1e3eaae5dece6cae6ba34be6090599de1904`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x571C	3058 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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