Malicious PDF — malware analysis report

Static analysis result for SHA-256 c251d92cb64f4b42…

MALICIOUS

PDF

83.2 KB Created: 2021-07-20 03:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 939a220ab9300e6832b8a7f89d2d111e SHA-1: e35231a66b53eadd442a9dad71d4de2652e53541 SHA-256: c251d92cb64f4b429771104d9616cd523ce7d212db1cd58c7097f97826b89500
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The heuristics reveal that the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. Although no scripts were extracted, the presence of numerous external URIs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5018

Heuristics 5

  • 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
  • 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://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741dd6e06ce---wujibudagebatogigadujeb.pdf In PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/ruroperagaj.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/90d35047b64c4b79a770588c2732bbd9/66513549198.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa95f87226---rifotarekadelowex.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/lutimoduruzuvase.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/m2j7cdv4njp2pfnchr1ghgjpqe/goxed.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebbaa28685---rusaretivajamikot.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/gfgdao5f9e554vqm9adf4afkbg/36107875647.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf3890cf1---95764086558.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/tapadarogifuf.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607511e1afcef---45766163311.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/lulot.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/jofuvilojilidogidukete.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/22313967578.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160913a35eb69a---58447419134.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607647a28cd60---mifuniwupuzelesadunasimu.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/gekunajotirafi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4122581a16---roxulokapizakadimawojura.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/91593946912.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/12369490459.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2d4bacd9c32ecc54979874adac15b78e/mafuxadunazifarobupev.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/poxefomopemakamepada.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/muviniromawax.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/tncr60umebpv6ap3qq85nflulg/78818320322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=practical+text+mining+with+perl+pdfPDF link annotation

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