Malicious PDF — malware analysis report

Static analysis result for SHA-256 652a02a1151cfd29…

MALICIOUS

PDF

109.7 KB Created: 2021-09-01 16:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ce77c15073708ab10692e1738d86917 SHA-1: f28fb43ae492f56b6726c303334e088a86d4399a SHA-256: 652a02a1151cfd29c8321597acbc2acb03fe64a6210a076dda0413795ad69c43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. These links are likely intended to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the overall structure suggests a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/49975c6abbf5ea5af80bdb680ad80371/rubebovitegarolo.pdf In PDF document text
    • http://turatabor.hu/media/80469651980.pdfIn PDF document text
    • https://menu2uplus.com/images/file/13043387609.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/nlrjbl0lgsrtk09f13roj3hqbq/visefakukekifa.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c61eb31076a---luralixudutogex.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7c3ecb91bbf6761ba9b57b071c4b2629/79651546333.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80c3adc67a---jokixiredejotomesaka.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e227e5c12f5---rituvakegasupaduzesok.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/vexeniwuvanekug.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607128708217a---53563439379.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/jisesesusopoludoropuwomo.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/2ad9fc9282a906ecdef9c28fc78a5bb0/pokamop.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/wekopetesusajax.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/bikofivonapi.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/10129590178.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a52084090da---bugekugaxifuzazuwoviva.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/73645972489.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fhqn2cd776i0tsvjoa9pc1upjj/25897758793.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/wubuvilefuteduxaxes.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16118e512a2b0c---fijojamaxibonexalixebodem.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/id2fja3f3ethk3frh1ma4a2eth/dumabap.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/xatoravifunem.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/48344432676.pdfIn PDF document text
    • http://mesterek.net/tmp/gotugoxelonipaxog.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/subugi.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/widikotapegat.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/ragujanexunezitewazoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+battle+of+the+five+armies+tamil+dubbed+movie+downloadPDF 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_off00014265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14265 19224 bytes
SHA-256: 6023c70d55b7636d184cf1759ca10b65b1aadfefd85b5b5b4a10a61b794cd1c3
font_01_sfnt_off000174b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC7 10976 bytes
SHA-256: 85237e13d844da713b492d27f6a0a86aa4264f30916b743c0737459ee70997de

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