Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf554b6a52de9cb…

MALICIOUS

PDF

89.8 KB Created: 2021-09-04 21:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2b8268d43cbf1779eb8eac75879b5987 SHA-1: 726ce0cd9563d1c85c78b17b75d014a9d81f1e40 SHA-256: ebf554b6a52de9cbf973cb0536c77c28e2b76a83e3b2a5d8bab4e8b6e7e7d40c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://e-hematologica.pl/users//file/kagipaxojebewoloretob.pdf In PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/adcf590434d6e0a97dfdae9b3eb23460/nuvevavadajo.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609403c90154e---murorovujufo.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/79553664548.pdfIn PDF document text
    • https://papiratisk.cz/soubory/nefumufijigofiberok.pdfIn PDF document text
    • https://faprosid.com/file/luratezig.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/k1gm69ilnjmd1f14kh8rm4b31k/falagatulixevisavej.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a63fdfc7b---babuto.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/zebaneboweluk.pdfIn PDF document text
    • https://aashianarealty.com/file/46673975328.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/72365935489.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/55430881908.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/bupste4e8jm6hrepsf5ga7lkpm/62277552256.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f22c435c341---paninetinukesuj.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/1v1j5diof2qfk79stdbnf8p0ba/tipapanofa.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/29b92d8ee5ce7910728bae3e02689cab/53772014611.pdfIn PDF document text
    • http://contextuae.com/resimler/files/50602332977.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/mfe4n4ge5ckl7t8l5jgk6reu6o/34797237138.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/xalalesawazadukedozuwi.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/93cedc9014a6a553a2c9ca57b532d4a7/66739604949.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210821075755.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/78791976217.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/80412548335.pdfIn PDF document text
    • http://vtaky.sk/media/file/58812337523.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/noxabowiteromasaxin.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/bagakobijogivubivazeviko.pdfIn PDF document text
    • https://basisnomor.com/contents//files/puladaniduleborozofakibeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=marshall+mcluhan+gutenberg+galaxy+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_off0000f993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AA 11304 bytes
SHA-256: 49eecf70ec05ad06e747cfe0186ac53af5ed41b45c5f3bf23b10287788527b58
font_02_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 17556 bytes
SHA-256: 1339c3ec7fb46c6a93dffeccb3c5b97b47e8f5b5bcd50f1b57434c7161ba6081

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