Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a7e4959bbd7986…

MALICIOUS

PDF

42.0 KB Created: 2021-07-07 16:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: fb5a8fe1d11131e705cac0536eaa829e SHA-1: b09614a68710ed3b15fb3ef27734d858a08589f3 SHA-256: 25a7e4959bbd7986e074431d71dce6ed24f3d6e00bd311eba2c45164f07e25ca
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7020

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/si7g8n5be6jf2nta9uh6jjfecn/dikotoguxejilut.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/r9l9nbj7pho8fp7rjj6nt4s753/tuvurekomofivan.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ip7n562g2g1cdlt1cjtec8ri53/pevuneruzogadigeferafeb.pdfIn PDF document text
    • https://isleo.com/i_photos/file/10533584161.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/nulemokukefufile.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35f0cab34---fituvuxelojupapeteseme.pdfIn PDF document text
    • http://www.centralperdana.com/file/26387409494.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/tibaremamuruleze.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075db4a33bb2---60658779292.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/35250764673.pdfIn PDF document text
    • https://manenshop.com/upload/files/ledipil.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/30981593235.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/nuwizigiburuzivomavagon.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/89a539ca257e106406b1c997f5ed9926/sinamozu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160926fe5c9b33---fujokawukitisukekuj.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/pemasojukovotutopolop.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05635d215a---73637277604.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070372977195---supabomediwodo.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/23090478077.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087abddbf732---36838877712.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ae5c1c2e---8880366438.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2875c7f8fb---lexodorabiredozuzog.pdfIn PDF document text
    • https://newoptic.mn/uploads/files/mijarenofudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ncert+book+class+7+science+question+answerPDF link annotation

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