Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acad924e2251204…

MALICIOUS

PDF

51.5 KB Created: 2021-09-05 04:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f8ee7631bd1e52d932d10e6a2fc119a SHA-1: dc98c71219c3afb9b31d79be1446e2c6de8f34da SHA-256: 8acad924e2251204c90d5b6fd5397d3f9cf56203aec9f63dd9e77b3792a73b45
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or use link farm techniques. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics points to a campaign designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7960

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://securityguardsupply.org/php/uploads/file/vadotaxomipadalekolibo.pdf In PDF document text
    • http://churchtextile.com/userfiles/file/xojukowuxagodoxisusibov.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9596d22f3e---wunufenija.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/dizeligete.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/zulovinokadokobaduv.pdfIn PDF document text
    • http://fpole.ru/sadm_files/71956179424.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/31249022551.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bbb402362---44428508539.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160955f0b982f7---ladidazamodeg.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/ca738a0e18d6a1fff0b730eada0a0857/78071097471.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/80867904783.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b95e4734f8210a54faa020afce5f57ba/77272505592.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608f85144de83---sesep.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/bubuxivibiniwufemowas.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/virevomerap.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/68203954364.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/vivexoros.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=seal+survival+guide+pdfPDF link annotation

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