Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ae50240fe34fe4…

MALICIOUS

PDF

59.5 KB Created: 2021-09-24 08:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c4f1e4a56d9a14199b69061cbebd26be SHA-1: ebb87a52632ca755f0f81641c385e65e8d9fcdc6 SHA-256: 75ae50240fe34fe461ae6c28bf7b184da0e1ac3629a79364e54c073d5b7447fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or are part of link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to redirect users to malicious sites. No scripts were extracted, but the structure suggests it's designed to leverage external links for its malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5733

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://coretry.ru/uplcv?utm_term=usb+not+recognized+android+phone PDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463b34e4e49---bebilowuduruvemutos.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/62729207164.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/285746555.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/42673889701.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/36150917240.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mqq4kededhg31gel9je7n06s78/jobatasevuxefufiratuvub.pdfIn PDF document text
    • http://www.pvvc.cz/files/82110442211.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/61482207864.pdfIn PDF document text
    • http://ikansambel.com/contents/files/koxevobamuzales.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/45631159090.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/rovupisegalemipod.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/wozixa.pdfIn PDF document text
    • https://flyags.com/editorResources/file///sewoza.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/74503338243.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131f891ba3a5---22532538495.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/40741223444.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/fotiwu.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/nugatafuzepositurovulos.pdfIn PDF document text
    • http://bubb.cn/up_file/file/xolatajakajaso.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/sajarosezakem.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/zoreporub.pdfIn PDF document text
    • http://balalajka.nu/media/13100311576.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ce914a8c1---10233902062.pdfIn PDF document text
    • https://phr4u.com/files/mitibilalomunug.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497fa398ab8---lilajidirukon.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/vobogiwepogikuwixugubibej.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/bememufenovazifolata.pdfIn PDF document text

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