Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5e82ab08ed338a…

MALICIOUS

PDF

85.3 KB Created: 2021-07-04 08:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3540db3929004d3910d50c27996e75f5 SHA-1: 2b4798f78e8eedf073109d6527efbdac6fa4db07 SHA-256: 7f5e82ab08ed338a0d686d39acc4dddb4115619888d7fd954bb2d2cd4a7ad931
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6930

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://irlanc.ru/uplcv?utm_term=quotes+of+the+day+in+english PDF link annotation
    • http://myappartement.de/web/editor/files/vapogumimasodomugolawuxef.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/73c8fe6435564808a13cfc72fd1de443/6523919604.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23280db3c0---2023661237.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/5530779528.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/tojog.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074cf29b33c4---nomivogodobike.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/58300398479.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/kubukonirafaworunolox.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/93135883082.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/89654154614.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd91e0080---71801864979.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d247decb15---wiwutavobuwa.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafb771fcd2---76440034869.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/1vanlflvdciu7hk6f07o69h280/xasizulaxafew.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fa2ad1541---90649259727.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/e94envv28g2s1hl6eklks32din/zefupabomikuzuziwiruf.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05673b0b78---fuxosowiwipiworusizimurew.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd0e464750---tulasigukutin.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/n3rvshu9so23rahqu6meec4vv2/nulufowifabam.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/25f63203ef781370978355867d76a1a6/vejabisabopaj.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/c2aro9itjpabm4l46a1q60oiq2/kutesezofunitararaf.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/dotexizurogijuxiriwupuki.pdfIn PDF document text

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