PDF malware analysis — malicious · 4bd0c74bd5737da5

MALICIOUS

PDF

808.7 KB

MD5: 40bf9cf15d682b00240ecad175914a9f SHA-1: 57e44242809a1e4180ea496b21eba1575af2067c SHA-256: 4bd0c74bd5737da54920d98df21e28d47149e860e290bf9b63640f9195e76aa7

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical heuristic EXTRACTED_FILE_CLAMAV fired with 'Js.Exploit.Shellcode-18', suggesting the JavaScript is malicious and likely attempts to exploit a vulnerability or download a secondary payload. The PDF_IMAGE_ONLY_LURE heuristic indicates the PDF uses images to trick the user, which is a common social engineering tactic. The embedded JavaScript is likely responsible for the malicious payload delivery.

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` `e0f39abdf1b39cbf994a41747f48d8d2bb62d4bc791a80ceea7c660fe0017eb0`	pdf-javascript-stream	PDF /JS object 2 at offset 0x9E	41545 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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