PDF malware analysis — malicious · 4612a9bca84a2656

MALICIOUS

PDF

51.4 KB

MD5: e0b1ab906df57682a707839103bfbbaf SHA-1: ba90f65e8564ac508ac2f3f05b9d5d3481732b99 SHA-256: 4612a9bca84a26562fb2b5da79528d4ff01362b18be9f2e95c12c8f59cc7dff1

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript, identified by heuristics like PDF_JAVASCRIPT and PDF_JS. This script, stream_002_off0000c7b0.js, is flagged as a suspicious payload. The PDF also contains a URI pointing to 'https://bo0king.blogspot.com/', which is likely a phishing lure. The combination of these factors indicates the PDF is designed to trick users into visiting a malicious website, likely for credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9732

Heuristics 6

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 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 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)
External URI info PDF_URI

PDF contains an external URL action

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000c7b0.js` `fbad8050ac4c06e59c82f5b5369417ad654b2fb530240c60a706ff1de9474939`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC7B0	2636 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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