Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd3cae30154e939…

MALICIOUS

PDF

54.1 KB Created: 2021-09-01 06:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2336bfdf481dab0f40da479f24198465 SHA-1: 9d9a12a1425d8086a16f3f7f81d0ecd7ceeb7073 SHA-256: ccd3cae30154e939906245a037a23ae67ece4f9bf503d5abd3d36c5515513da1
154 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to deliver phishing content or further malware. The PDF itself contains no readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6492

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://nomylo.ru/uplcv?utm_term=standard+ethernet+in+computer+network PDF link annotation
    • http://yorktownhs1987.com/clients/57482/File/11617384470.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a9372abbc---benaxiramusudujuj.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072744e0ca8d---16243714934.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/rexefib.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210610_194158.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5vf17nueervd6gfepp3ntj5oj1/zinurabopifoxis.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/xaxuloduroxasokodib.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ecbca2c71---famogojexenupisawi.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88469be9d9---tefubogusadanegabalizu.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/14498421070.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0536ee91fd151183ecf8f00eb8351501/vemos.pdfIn PDF document text
    • http://air-ned.com/uploads/files/rutodizifobarusugok.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a4a9dfc8---61954488154.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161285cf6567e6---lunozevokojekanozivele.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/3330bc71b3ddfca64839f59c0bf1bf74/75764585678.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/66343049243.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce59079aa7---gowitunirezagofigafeti.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/wuwogugakomuludimorelape.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/5075093540.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210621225849_gfzhfr.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/25835056111.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a641ef130---vupamuzawakamawamizit.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925e02bd45c---jazofugonajawanawibol.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/2en447mla9i4u7h8bh0j2mdra5/95512243230.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/vixenokakanepufi.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/88449583818.pdfIn PDF document text

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