Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dca47efd48438f7…

MALICIOUS

PDF

114.5 KB
MD5: 8ae719cdd29f0e6af4d4dd321cc40355 SHA-1: 37f4d6b93aa312aca87480f16a979f6daa13c9ee SHA-256: 3dca47efd48438f78280c61920b0622976d36f1bdd30ea413112c7f7a4a7059a
160 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. This JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the ClamAV detection of 'Pdf.Dropper.Agent-7252458-0' and the detection of an extracted artifact 'Html.Exploit.IFrameBOF-1'. The PDF_IMAGE_ONLY_LURE heuristic suggests a deceptive lure was used, but no readable text was present in the document body.

Heuristics 7

  • ClamAV: Pdf.Dropper.Agent-7252458-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7252458-0
  • 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.

FilenameKindSourceSize
javascript_obj0002_000.js
166e84ed2f0b3f41de3db0cdc82e8f2909bba791e9f5796e90b939f6f476a013		 pdf-javascript-stream PDF /JS object 2 at offset 0x9C 36359 bytes
Detection
ClamAV: Html.Exploit.IFrameBOF-1
Obfuscation or payload: likely
Carved artifact contains 12 eval/decoder/string-building token(s).

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