PDF malware analysis — malicious · 9d15622d9219795d

MALICIOUS

PDF

808.8 KB

MD5: a2377fbaf1383cfdf0eba83fac6f2f03 SHA-1: 668e974b6373098c48cd6ada1cb645d60f67c1bd SHA-256: 9d15622d9219795d2170b25eba8c576b96770de91fd5a34d776fb3fc389588a2

130 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 ML classifier strongly flags this PDF as malicious. Furthermore, ClamAV detected a suspicious artifact (Html.Exploit.IFrameBOF-1) within the PDF, identified as a JavaScript file. This suggests the script is designed to download and execute a second-stage payload, a common technique for delivering malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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` `eb5f702662a8ae411fcb22ba8ff452b84a85ef057be8bb9c2cbc741323730e1f`	pdf-javascript-stream	PDF /JS object 2 at offset 0x9C	42277 bytes
Detection ClamAV: Html.Exploit.IFrameBOF-1 Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s).

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