Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0fe19ed9e969cd…

MALICIOUS

PDF

75.5 KB Created: 2021-09-02 11:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0db4886079e217774b295a8c6c269e42 SHA-1: d2df7072b9c3cb97bcb1227de059723d7abf3bfc SHA-256: ba0fe19ed9e969cd769c3b1c0b27ad5003654d74037f198dd6e1464cedba4781
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or to exploit vulnerabilities. The heuristics indicate a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to obscure the ultimate destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://taxforce.nl/userfiles/files/34393763152.pdf In PDF document text
    • http://ibconsulting.it/userfiles/files/tudiwozula.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fce3eb73ed5---gogalowabuma.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0bd094d18d944e0acfd9569d1efaf578/lekemapawedixum.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072814bce665---kagubaviwijipukuzikabi.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/83268879536.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/2372657662.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/49218145475.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/35451388542.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/54515809462.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735fabbf1cd---gapivejusu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094339b16225---95666845673.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/rikezegofulifegerajazikal.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb59ce83c---tipufawemevos.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/wajudibodavozikorufepabe.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/foberasanodogob.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/227249628.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/zisimamalumi.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af001a89c9---75954758726.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/4ee7aaab449b7ff1cf3a735b7c61920c/kazuvedivulesikejakuduxag.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/xezap.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c22509c65a---55705727040.pdfIn PDF document text
    • https://isosklo.cz/uploads/19189426149.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99d1cd209b---palazulefiwezufajusov.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/nesopowazanugapadoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=competitive+intelligence+model+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_off0000c220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC220 10632 bytes
SHA-256: cd5b6025156968999076a6a99bfc74fb367aabbc6206e007b113081fb6b150d8
font_01_sfnt_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 17952 bytes
SHA-256: f61b6bf9d31325b144e789566677e61cbc677d8ec0894aa497c55d4cce59f5ee

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