Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca38c1fcebb9a39…

MALICIOUS

PDF

58.1 KB Created: 2021-09-10 17:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1ac889a8eb8a800a05dbb85098ab2815 SHA-1: 3f70aeec8222c54b83ce0e837c40d6136d35f5d2 SHA-256: 6ca38c1fcebb9a3943966d1228660364b81e54f034de9ab544decbec5fd764a5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern involves luring users to click on these links, likely leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6909

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://oniceh.ru/uplcv?utm_term=sana+sin+esfuerzo+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136452a6be98---57049161636.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/pevinosofab.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/53742784115.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02072ab18---53119793890.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/mijopajufu.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/xitidovujaxitipal.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f064e46ab---29710845801.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/93322283183.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/47862328585.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/zarexawagizopamiwawulobi.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/33901320267.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/h5nhq5gg2f1qjlvnh6dvfpfma9/8142389789.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-10/20210910160028120497.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/65530121399.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/dusulomanogapaloxiwuror.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/24500458061.pdfIn PDF document text
    • http://lizhechem.com/upload/files/nelexixezuvuputerulizuk.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/45476262952.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/punanagukos.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/kefiremimimizeb.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/zepamurofulexotatanom.pdfIn PDF document text

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