Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5a2c9e66a4f913…

MALICIOUS

PDF

58.1 KB Created: 2021-09-04 18:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 007976fd215d496ae0cbd4f9d545dcd3 SHA-1: 1080d4bf87d2d1b483e5d292eab4ecdf7aef75f8 SHA-256: 9b5a2c9e66a4f913147f790b67fe4350001667e0c8e793c568ced4dede8f5d2d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the presence of link farms pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7219

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/1d0jnl0dr8gvvvsra5qmhl4qk0/jagotuguvowixojetolotisul.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/u0t96a6vf4chh4csfrpplmiqp0/97345651953.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1473a9c99---zizedimodol.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/72794374966.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab62c51ff2---21723086207.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/210730174443166063ty1wol.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/ronumepujegasifimes.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/sojuxamajigoluxeraxijugu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/pn9ktttldpk6pfjffikfgk7bo2/67915979840.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/4e86a48be4f1dc49df4c29398b123664/pulusivewixigikeladixuwow.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/8989561716.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/34442639300.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/negedekeb.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/91930198218.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a711dfaa44281d402897fa734e011604/zotuseduniwawazomizub.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/xafipatodi.pdfIn PDF document text
    • http://minhanh.com/files/rawedaromukuzutuvofubif.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/81066738504.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/42404233366.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/86960042062.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e775becbbf9c7db1c7911790e3372554/bimuf.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/52498214506.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/26339876254.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b94448513791abc3fe26e6c6f4d8e3f7/97542332206.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160909d122f80b---kosoripomixivovu.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/suetv25cit6c3jdbk7ifsjs223/35757764700.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/eba4f1e7d93f9f1229d8e34182b6d5d0/74576640737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sickle+cell+anemia+genetics+pdfPDF link annotation

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