Malicious PDF — malware analysis report

Static analysis result for SHA-256 33283b47ef9bccfe…

MALICIOUS

PDF

52.5 KB Created: 2018-02-27 23:22:30 +11:00 Authoring application: RAD PDF (via RAD PDF 3.5.4.1 - http://www.radpdf.com) First seen: 2019-08-04
MD5: c987c59994a5396271a1884004c48b49 SHA-1: 5a7ba18d7592525c2bae624752b6b26f05b8b7e3 SHA-256: 33283b47ef9bccfe05ee4ece2a4f1da64b57c1403278ae132329c20d4b0cf150
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic indicating it impersonates a cloud document lure, specifically mentioning SharePoint. It also embeds a URL, https://onlineclouds.tk/PRO/sharepoint, which is likely the destination for the phishing attempt. The file's verdict as malicious and the presence of an embedded URI strongly suggest a phishing attack aimed at credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0132

Heuristics 4

  • ClamAV: Pdf.Phishing.CWS19694f4f-9890229-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.CWS19694f4f-9890229-0
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://onlineclouds.tk/PRO/sharepoint PDF link annotation
    • http://www.radpdf.comIn PDF document text
    • http://www.radpdf.com)/Author(UserIn PDF document text
    • http://www.dynaforms.comIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://lucasfonts.comMicrosoftIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text
    • http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0XIn PDF document text
    • http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0In PDF document text
    • http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0TIn PDF document text
    • http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0In PDF document text
    • http://www.microsoft.com/pkiops/crl/MicCodSigPCA2011_2011-07-08.crl0aIn PDF document text
    • http://www.microsoft.com/pkiops/certs/MicCodSigPCA2011_2011-07-08.crt0In PDF document text
    • http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl0^In PDF document text
    • http://www.microsoft.com/pki/certs/MicRooCerAut2011_2011_03_22.crt0��In PDF document text
    • http://www.microsoft.com/pkiops/docs/primarycps.htm0@In PDF document text
    • http://www.microsoft.com/TypographyIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off000004f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1 97544 bytes
SHA-256: 02d5bfd0da07ab289434b3da82a2553dac45c27b997ee1f46f87ae8840bdb9cf

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