Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b24dea0e26cbf8…

MALICIOUS

PDF

114.0 KB Created: 2021-03-19 14:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c5692ede72bd02df8fe31a4baf8f89c4 SHA-1: 586fd9ee447e60df381ce5ee967fb7756dd5d2e9 SHA-256: d8b24dea0e26cbf8e5326e8d546fd941ae2a042214e6e327f0f5a21753c1a7a8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as a product comparison search result. This URL, 'https://xajibur.ru/wix?keyword=jbl+studio+530+vs+klipsch', is the primary indicator of a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file, suggesting it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=jbl+studio+530+vs+klipsch PDF link annotation
    • https://cdn.sqhk.co/nazalugewu/8jj0Pxa/85162147221.pdfIn PDF document text
    • http://boomerangoo.site/doridajaliporuwofirizaaj4ty.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499341/normal_5fc7053211924.pdfIn PDF document text
    • http://hookup681.site/zutezudepefadepei710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5fca5d3fa8011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6022256f87829.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/aNexFhg/32836468541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_6011572bedf5f.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/MPVhbdI/cuisinart_knife_set_with_sharpener.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5fcd716ebf067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31350d32-071d-4624-a64c-7b9c133b0acb/51383526801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7eace6-c41f-4611-a2e8-fdd4b05d3d13/feriados_puerto_rico_2020_microjuris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd903d21-7838-402f-875b-a805e97c031f/miravumusutazutadirejomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ef300f-a0a8-48e3-82cf-28fe0d2f750f/zukurujavuzaxovozufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0198142a-1932-4285-b134-f353240f5946/wordpress_login_page_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0429005-9ed2-4261-a433-827340fb5caf/gopipazererif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21693a0f-499e-462e-939a-242a2ddd8216/76137162356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d678cdd7-104f-4908-a28e-ee03532a9e23/lan_cable_color_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baa6209-3a00-4579-b9dc-0a2a3efbef21/kedijuzorufubal.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F9C 5540 bytes
SHA-256: 1053278c231dca849f51b5758325561570909818cc88f84c91bbc4ccd564c294
font_01_sfnt_off00019277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19277 11936 bytes
SHA-256: 188a838ff4140542f22f1008fe12f1cd4640baa1a6563dea35375718fda97267

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