Malicious PDF — malware analysis report

Static analysis result for SHA-256 56734da861a7d95f…

MALICIOUS

PDF

34.3 KB Created: 2023-03-02 11:00:10 -08:00 Authoring application: iTextSharp’ 5.5.13.2 ©2000-2020 iText Group NV (AGPL-version)
MD5: 0e672cfd6083d74fb5a0be79346a52db SHA-1: 9a66963325418ece8dee9630fee84291f83361e7 SHA-256: 56734da861a7d95f690e0172e717cc933513e37677c18c9277a2a261e55090ac
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF is identified as an image-only lure, typical for phishing, designed to trick users into clicking a hidden link. Heuristics confirm the presence of repeated, invisible links that deliver a payload. ClamAV detected this as Pdf.Downloader.Iceid-9992787-0, indicating its function as a downloader. The primary IOC is the URL from which the malicious ZIP archive is downloaded.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8944

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.Downloader.Iceid-9992787-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Downloader.Iceid-9992787-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 34 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/dulcet-bonito-377702.appspot.com/o/NjbqZi57b9%2FMar_02_Contract_19.zip?alt=media&token=26aff41a-e640-4741-9b66-c3821f31a7d0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
icc_00_off00000058.icc
43cdd2889d7e967a70e3688e45dc50c2f596288a4356b41234d247bbb69d5f30		 pdf-icc-profile PDF ICC profile at offset 0x58 456 bytes

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