PDF malware analysis — malicious · 8d1332f58a7329f9

MALICIOUS

PDF

95.1 KB

MD5: 9d60e82d499869cf12ec295d2aa375e5 SHA-1: d402216675f68f0b065cccd2c496c86740bb8f58 SHA-256: 8d1332f58a7329f9366f9deafb0531ab536b4fc78f4e9b07384f749bc86a01e8

130 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, which is flagged as malicious by ML classifiers and ClamAV. The embedded JavaScript is likely responsible for exploiting vulnerabilities within the PDF reader to download and execute a secondary payload. The presence of 'Js.Exploit.Shellcode-18' indicates a known JavaScript exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 6

ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0002_000.js` `7c4ca1a52f0c1d9e0048cf047e7ac532da95a8841a337569aba31d9a733f0afa`	pdf-javascript-stream	PDF /JS object 2 at offset 0x94	3853 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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