Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c7cbf952450ef4…

MALICIOUS

PDF

96.8 KB Created: 2021-03-25 06:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0a6553418280c7aac34b7498d4d5423f SHA-1: ee9cb02e83b98b25760dbc65633fc01d20aafc7a SHA-256: d8c7cbf952450ef41a14540c8a2a338c0eed2e97862a398c3856c585e6b5ee37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The embedded URLs, such as 'https://kuzutuzo.ru/aws?utm_term=genesis+2+biblia+catolica+de+jerusalen', are likely used to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://kuzutuzo.ru/aws?utm_term=genesis+2+biblia+catolica+de+jerusalen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365998/normal_6036a69bafb04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458837/normal_6006ce6008c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6040332faf992.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_098a22e3083d4db38f6e967cc11d8775.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_5bf7444a8a3748c38b895183a0065b37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/bradley_electric_smokers_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/92296512482.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_fd00ce987ce94560a279ca44cacfa358.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/process_flow_chart_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/taripofosamatoriru.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_7fe5fcdab94b47f39eccb8d5ea2dce8e.pdf?index=trueIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_5c0637e6c8d7423a92c1f6b68e3f7416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zosevid/how_to_negotiate_salary_new_job_via_email.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_400a4818beef4dfbb501271babef2392.pdf?index=trueIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_ca2b6d6f841a40cfa4ec3e79765cb2e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/what_ports_does_sap_use.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/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://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 5312 bytes
SHA-256: 3424ada5ffdb0aea97055728f97876e3974c8312a17c19e5d8da3f0e918259f2
font_01_sfnt_off00012750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12750 17520 bytes
SHA-256: 80f10b4d8f6d70c184dcbb2cd78391fa902b6e322bbbb5df67f817056f0a790b
font_02_sfnt_off00015d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D64 16624 bytes
SHA-256: e505144caa6c5dfee74cba6944211dc4f9606d84954b9d0f0e34faea289a60ef

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