Malicious PDF — malware analysis report

Static analysis result for SHA-256 c609d3bbe5074833…

MALICIOUS

PDF

69.1 KB Created: 2021-08-14 22:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5572907d2782a1116f6055bf5542400b SHA-1: 51ad7cf2e4936439cb31a96e9547739a6714f22f SHA-256: c609d3bbe5074833e0e4ea7b341c4df07e1fdb6a6ef804917782bebe9047bf89
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature. The primary attack pattern involves directing users to external resources via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6374

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://kurek-rowery.pl/user_pict/file/digaxogi.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab295c6f833---gawusosogu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/4259a355a13331ce1cc31bd9e7b10359/zimunaligerabo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8e54a9b6---girilami.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/nesojezebadira.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/solomamafevozoliba.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/milita.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/telodiwedud.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719f6261d7b---jewitegeros.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///27232218049.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0c43bc2ac28d1a2506feb1a483eaa517/tifujevidisatuxejapiwumil.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/19911711615.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/s7dqaq2k0imbh8951gjpoopmm5/sozej.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdcc288051---69287107432.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/fa12a4d93ad2f94ec2f10d73b25009b4/17315581581.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/avlc1gs86k018s8j1inroqupg3/84065092463.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijotokurej.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/76059119122.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/86104256428.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/18984293027.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87181962ef---13538090991.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2c515cfc---zitusarubivedobisipa.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/62644054868.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/gufosezanesulepojakeje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=samsung+s9+android+10+release+datePDF link annotation

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