Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd989784cc31b47d…

MALICIOUS

PDF

58.9 KB Created: 2021-09-01 02:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1477f0467d435ba59335198fd2d768d7 SHA-1: 21054c37f5fef7558f920516bccbaeba6e39141d SHA-256: dd989784cc31b47d4c853c5eb9df91f766116502c8efe7390dd08a0bebc8e659
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to compromised WordPress upload storage, suggesting it is used to distribute further malicious content. The presence of external URIs and a link farm heuristic indicates an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/k4ho95ua04vsoomqtk8fjpk9qu/kutepananopapivefuvofid.pdf In PDF document text
    • http://patrickstaxi.fr/userfiles/file/tenosaput.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16097659eb5178---revujurubazowiferixuper.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/73547447633.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/doduvijapipativezo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611364d687032---nitusib.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afc10013541---36102584742.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160737f78d0a57---14898446461.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608558d738209---rifisutir.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021060305022280554.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f627968047a---todivamozasimewisikebexun.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/wozurakibu.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf6002e69---guxevifurod.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091712fd09e8---47035154545.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/sadinatexojutakurezam.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160981112964e1---56306019531.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/54797215243.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/22683473287.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/bigelenosimufa.pdfIn PDF document text
    • http://kasargod.net/uploads/file/zajiforarijusawusi.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5ca8033c95030b4925e5fc350019a91e/57210231714.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22717910684.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0f4cc56---bolokod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=115+pounds+to+kgPDF link annotation

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