Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19debe9342ada0a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-23 10:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 999b4f1fa2fe1c8cce732ce857bee257 SHA-1: 426c3e74df2f11b9a0525bf224964beb36446c55 SHA-256: e19debe9342ada0a3880dd4f45f5b6bd8151b6ce8eb4c1aff98f3195883f559b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised upload links and a link farm pattern points towards an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.pzkexie.com/up_files/file/bexemifajisovoxomadinavul.pdf In PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/47128638276.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1f86e476c---napet.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1bb94b40c8fdec50a5a16fb9a412e25c/zodawi.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/kises.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/dd174a2ae1deb2067f30aad1de21656a/todokimukakidafuvuzibedov.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be16497e147---91875185540.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f2569870a7cd0f335d9350b754af54bd/pebojasel.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4887123907.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/vodufizubigigamowopo.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/80053424306.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0188c8f680---wamodu.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/68365709393.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/letapobibepugis.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/n5qnfbobtnuutr9ujvf5n9gt1g/50959700104.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/54444531177.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/3ce59bb640f0f17a38d3cbcadbfef92a/fikatagibobefixo.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/31513641457.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbced5aee---luwesanupagavuxifegetikok.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/revemolufovevut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gold+sovereign+mintagesPDF 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_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 10696 bytes
SHA-256: 6e0dd354ae762c497757361475bb52ecfa6db3e0ac3ec743f3159fd79260acd8
font_02_sfnt_off000124e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E8 17268 bytes
SHA-256: 6c635ad9054c04fbb65de75db59e0837e94cd80b9d21eeab02a7f5b41a8e619a

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