PDF malware analysis — malicious · 3901871694efc1e7

MALICIOUS

PDF

2.47 MB

MD5: d2920ecbf44ac34371bb4881d9c15d31 SHA-1: 3bf10774cb65f46653a85f497bce1cad5f22bc29 SHA-256: 3901871694efc1e7a6ad686401b5f52dc989254014717875b8d1ff2e098593ae

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical heuristic EXTRACTED_FILE_CLAMAV fired with Html.Exploit.IFrameBOF-1, suggesting the JavaScript is used to exploit vulnerabilities or load malicious content. The presence of an extracted JavaScript file further supports this. The script's likely intent is to download and execute a second-stage payload, contributing to the overall malicious nature of the PDF.

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` `61c2080cff9517f28a3988f07507489a6974960ec6c7355ea0f49f712ea34d4c`	pdf-javascript-stream	PDF /JS object 2 at offset 0x9B	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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