Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4094a7a42e29cc…

MALICIOUS

PDF

145.4 KB Created: 2021-07-13 21:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 281420d43371aa1aded2349797e990a7 SHA-1: c526366e18a5972fdee760c25322dc05481adc86 SHA-256: 7c4094a7a42e29cc0bd78d4866dbf92f7eb5529a3a908798b1f3d899f9ea3ee0
156 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 file functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting, suggesting an attempt to manipulate search engine rankings or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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.
  • 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://nic-n-nate.com/files/files/54265726340.pdf In PDF document text
    • http://ambvetfanini.eu/userfiles/files/34256310301.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16074491cec421---rilovunogufadadodevaneda.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbdeaf126c---futadadiwevowanezinelaw.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607625c5ede2b---wezixuxewadiwemu.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/qmc88kpuql1uq9j84rabiak2t6/rukopibadin.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a16515ceb---67425863375.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/1debd76767c372e5a0705d3b0a3a3c77/84667429995.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160834934606bb---tesozadubulabom.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/61173964788.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac84208f5c0---wagagimekiwosudediv.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6cef0f57c---loxijarafukeniporoto.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/23bbfc57cdd62264efd61fdca60c5542/68463853292.pdfIn PDF document text
    • http://wirheiraten.de/images/file/munuromajugademo.pdfIn PDF document text
    • https://mmszke.hu/files/file/82365377416.pdfIn PDF document text
    • https://capecoralliving.com/media/file/67453630497.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7e54a2b090ed9f5b35256b5c4cbba663/mokebubakositikobokumoto.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8c6319260---burimobafafifise.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d313467342---tejerofebesewawida.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/pockqroh8a81ia32qujeskscr0/kadekizozoxunusukomobewi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5411b72bc41a45f3b257602db1dc3ed4/dawevokarafoxironodotemo.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/78021405564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=best+songs+of+2010+to+2018PDF 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_off0001d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6C5 18132 bytes
SHA-256: c8030483268695fc886a8766e9ff859ba3f40ba2063d4baac96453a9bfab99f6
font_01_sfnt_off0002061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2061B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E32 10544 bytes
SHA-256: 9310f4c0508ebf65c61a35a0cfd053fdf4b03e174d78d036b180057798e5e947

Open this report in the interactive analyzer, or submit your own file for analysis.