IcedID — PDF malware analysis

Static analysis result for SHA-256 0fbe0024554ee9ae…

MALICIOUS

PDF

136.2 KB Created: 2023-01-19 10:38:02 -08:00 Authoring application: iTextSharp’ 5.5.13.2 ©2000-2020 iText Group NV (AGPL-version)
MD5: 95ac7f1da2334fa9d695664c5b8be3f2 SHA-1: 9c941e42f6065962ce6d0035d2cf8d3d9aeb44d3 SHA-256: 0fbe0024554ee9aee8d6c5814bf16e33d9a90425ea7230ac72ae7f4e2df73938
172 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a full-page image designed to hide clickable links, a common phishing lure. It repeatedly embeds a URL that, when clicked, downloads a ZIP file, indicating it's a downloader for a second-stage payload. ClamAV detection confirms this as a known IcedID variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9619

Heuristics 4

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • ClamAV: Pdf.Trojan.IcedID-9983376-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Trojan.IcedID-9983376-2
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 136 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://firebasestorage.googleapis.com/v0/b/planar-door-371720.appspot.com/o/5kimaItx2Y%2FPaid_Offer_54_Jan_19.zip?alt=media&token=9bbf1e4c-9a29-4df4-9c2d-1705e463d963

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000003a9.bin
57245b4e50e9fb8bc296728c2957ce6552e4468a510cc7f696616c6a4f708ff4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A9 1437294 bytes

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