Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e4729fcea77b96…

MALICIOUS

PDF

65.1 KB Created: 2021-06-26 18:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a9aff77e5a0611a8d773d65073c84fc3 SHA-1: 6d81da569853dfa9d7d21bf9af75bc9f2b0a48d4 SHA-256: 91e4729fcea77b96d54d8eb25db121a051fa3b1153905dfccfaf18278080e8f4
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it contains a link farm pointing to multiple compromised WordPress sites. These links are likely used to distribute further malicious content or lead users to phishing sites, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

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://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b799990a9fe---lezejuloroparinar.pdf In PDF document text
    • https://bestofbucerias.com/upload/file/loxowudol.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9cdc4fc6e---44988764388.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/xanamom.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/239c4fd4ebad53e57035acee1d53bb33/sefopigowetof.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202106191432433987.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7e55624f43e326b45f852af0d35e4ff9/votorifadu.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba99fbdad0---guvevam.pdfIn PDF document text
    • https://rm-parketi.si/uploads/79258466809.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608752e025a35---26930863679.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/luwazimisixofowev.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76e277934---61203170998.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/e2a8f1e44d453affcb417b7f6104c4c7/kupuvadamumazatuz.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/zuruxiwufukuvo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ej9pes5claq7upshqpsdia8pg5/90233550025.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/josolaxemitotob.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0da2b0f1a---80182758688.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d07bdc18e6---vozesusakuk.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bce08804660---medezulusugisuwefako.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/mipexuzirawixagab.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620538035.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609494899f6dc---47293870403.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l8lpng5jlad0a1r035ph1lq5u2/32303247588.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b756bf356ccfb5ee5ecbf9aed5181f68/70967687965.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/5dbb291730f4ec0b0dcd36d6de1b01da/84286271992.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06bbb7040f---gamelukaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=hebrew+word+for+love+in+englishPDF link annotation

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