Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3e6a489a830d8a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-06 07:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e4bd255a1335c80074bf4d319bf7502 SHA-1: 02ba5b5a844b14fce32cf603ae138d58e433ccb6 SHA-256: 9e3e6a489a830d8ae8fe57b2a73cdbdd345aaf0fb8b0316de54ba796ad74646f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm hosted on compromised WordPress sites suggests an attempt to redirect users to malicious or phishing content. The document's structure and the nature of the URLs point towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb718a3a9d4---58011345279.pdf In PDF document text
    • http://bayanairag.com/uploads/userfiles/files/96667929479.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6fff3fc5---39884353293.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/73897892250.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/83032841187.pdfIn PDF document text
    • http://benetalent.com/upload/files/68111711264.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/0c2db7e1391809f0779a412c55bdce9a/zetagopebafamigulo.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/357524576.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e6cc7ed52---noxowazivakiguwumunobido.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/61517748964.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/70876229117.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6be455e53---78531809192.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/86929076048.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/20430178459.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610bde9993de2---vusilomonuguze.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/fozanezofuge.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/15341055345.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb74c5a710---52128630089.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/gosulisalu.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/vezopipunekugejilodebezez.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/5112925980.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/24610106477.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7b75jaj8einupjbi37nfjf4771/3673613856.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/valimufa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=sunday+school+manual+2018+pdfPDF link annotation
    • 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://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_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 18240 bytes
SHA-256: 29187db7a883324e333850c63cec4ea49f53056324a910752166f6f5e57f287c
font_02_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 11256 bytes
SHA-256: cb964b920b90368f5ea0f30e954fd6c7261debb5ba9aa06a1875d5863d1f0374

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