Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb75ce244065727b…

MALICIOUS

PDF

55.3 KB Created: 2021-07-30 20:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba87356d367a7fa138f5d25f704a0552 SHA-1: 3f403a968ea5f2c2143546312b00fdf28a545f1b SHA-256: eb75ce244065727b130395875a820c7be4fbe8980e7269d9fcf326db7a0b0927
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability for client execution. It functions as a link farm, with numerous URLs pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://muzeumostrowiec.pl/obrazy/file/gisexupegis.pdf In PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/vuxuvokinumufeb.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/getijirazufevesa.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/90530117736.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/jobokufoneremasudejinik.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2189a270---42979168262.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc7d281cde---xadalaxuniniwakasimi.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607968436a09d---bagemufe.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160792f3a2712f---xajibedemezubi.pdfIn PDF document text
    • https://aedwea.com/upload/foto/bugezojiwelipuzegomoses.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/zuzibafubuniti.pdfIn PDF document text
    • http://splogservice.ru/content/files/17829798920.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b4a0bd6d5dec7fbd2839fc618be04246/36871655885.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5f5857eff61a1584c8c1858a8fc6c979/zitepowedagiwonogoro.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/u76a3liu34pstc9b6benanguv4/kejametasinororapozoreso.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/kofifunos.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/19687762056.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/solaladotegewofojudaf.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/63863500617.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/22958434421.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c684fa962d3bf57b039f011e585f2ed5/51096230167.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a0ccb6fce---levutusifedaruritekuga.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2mtf0ae9i18obasp77a4n0osj6/23502216160.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210522045733.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/rinekesudetefojiwuxojes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=survival+on+raft+crafting+in+the+ocean+mod+apk+versi+154PDF link annotation

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