Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5e0a2cfcb55e59…

MALICIOUS

PDF

140.2 KB Created: 2021-06-24 10:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d31e3c3844faa7b1d0866c01e2b903ff SHA-1: 35c94908637c119dbe587da55fc9160a5e5b609e SHA-256: 8d5e0a2cfcb55e5944ef468547347649a098883034fa441a7cf65f902360ed55
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 phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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://synerhu.ru/uplcv?utm_term=dios+te+salve+maria+flor+y+canto PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/193168090c41b36742ed8866eceb0b8b/95555490431.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/vipivezatoworilomuroxuj.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/61560781176.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dlvjjt2v19pmft2mc3373hnmer/rufajadadawexo.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7ed0e28b1---vowobom.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/70427841451.pdfIn PDF document text
    • https://lesura.net/userfiles/file/zumogarixukijite.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/tapituduresizex.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2e5e8c3dc152f3e907089baf51bb3eb5/41183894782.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/paq26ul47get01ktd3m9hfsc37/67875961921.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/iki4u6lvncl59j25iet0mkk9pj/52124519483.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/xasasedivetek.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39c61b34e0---34072478173.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a75a316a844132b62b57f417b0cae1e6/jonowolesekekizexab.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210523125627.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/9626765ca483b46a4fcc77f1b8158cf4/24223138593.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/kukujimire.pdfIn PDF document text

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