Malicious PDF — malware analysis report

Static analysis result for SHA-256 294c35e6976e89ce…

MALICIOUS

PDF

80.8 KB Created: 2021-07-31 07:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccebe22c5218df618ea1ac2ec702dd04 SHA-1: d5ca0f615ce021d05dff160085d2be01cac89464 SHA-256: 294c35e6976e89ce2508a77b97c11402919f36e908c4795b7144c68fa7a92558
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm strategy. The primary goal seems to be directing users to potentially malicious content or further phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nomylo.ru/uplcv?utm_term=ejercicios+de+raiz+cuadrada+exacta+y+entera PDF link annotation
    • http://charivne.info/images/file/23088022891.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb817a899---6205103614.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/b0bbulh2m1r48ukj3bpuup1ef7/mosugazados.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c93bf3c633f---86943858992.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/dibezexunasuxo.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2ec8ec396---zifasinevewofeweru.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/49129deb28b77eda7e7275f818e6206e/dokamaveka.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/89344300609.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/19088246056.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/04331bc933f0a1126ed530fbe6ed7aff/kidibovexugupopanekivoguv.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/44052097215.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-11/20210511115604107997.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6f244381f---vuxilejagixazijifamubedo.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/datuwediwagatotaj.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/werizi.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ba32a190---melajaxuw.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/kalolilona.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/71039217491.pdfIn PDF document text
    • http://grupahatak.pl/admin/_fck_files/file/56075064760.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/bofixetomabaterigiladagid.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/notovaxisiwenukimijew.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/u84oa0l3qh8b4j54t63sam9n93/48634736716.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/0r3fshnmnb3du465021ulld235/lesurosugujesex.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/161001293e7306---80831600289.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dfed99c3e---2558610338.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://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_off0000d53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 10808 bytes
SHA-256: 90a78d8d2cbe43896b6a5f6d57eb46aa98d39da61816ddd0c4dfb82c9ead2e5f
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 17240 bytes
SHA-256: 5172c26eca20f606c981860180ea5e9bd1e6e4457fdcd85e32d5f8946d4a538d

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