Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e0c316c4f6887c…

MALICIOUS

PDF

58.2 KB Created: 2021-09-15 23:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f489a347098a46b65f85643c1af855ee SHA-1: 8dbf58dc743c97c6af19046952ac672d1f2a6502 SHA-256: 24e0c316c4f6887c8c7ed510577d9e55e52159dc2ee84a120d5fe99107df5d9b
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4489

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 https://oniceh.ru/uplcv?utm_term=how+to+create+website+shortcut+on+chrome+android PDF link annotation
    • http://asr-net.ru/uploads/files/momusagunasum.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/43349186574.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/11483377410.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1630950799.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/50723387611.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0b9ec8691---kotafup.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/81650301371.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/25825174519.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16136f27aed18c---80306943785.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c65a3a59---35385788246.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/tixetujenizi.pdfIn PDF document text
    • http://juha.be/_files/file/52452454099.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/merawepofarapobaminux.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/71067802343.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/94012562731.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/8fb948b821d40348b9bb30e9ea6f8a52/midawifirit.pdfIn PDF document text
    • http://brlairport.com/images/file/fewetubifimeruwej.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141638a2bb2c---71198810245.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/31584157260.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/tixopodefibu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16133203aa60c3---wugawewaxikinumebun.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/vunegaxefefuf.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a29a46887f8c152889afcc037b3330ba/45725938573.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/99612033078.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/bovobaj.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/25569302920.pdfIn PDF document text

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