Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2d01d3fc859ee9…

MALICIOUS

PDF

44.5 KB Created: 2021-06-28 06:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a0010251ed99efd21fb55631301441c3 SHA-1: 906eecdc5ff833aac836394da517d5aca50123ec SHA-256: 1b2d01d3fc859ee935a5fb7f80966eec4dc3ae4197c3c8fe54014b15cb3ceeb8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5294

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
  • 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://nanyangtextile.com/userfiles/file/12221313089.pdf In PDF document text
    • http://wildpflanzen-planung.de/file/zegosunuridogasebuleza.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf21f5cc58---kubezufalo.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6aceae13a8b492c90d6c5f096f75d673/89775326656.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/poloxetoreluset.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/repefod.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/mutipowoto.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081816fa8799---26260909685.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/22580622861.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ohp8p0h3fg691ji3enu0aik0n1/sixijefotobafokalurazifis.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/badugigizazoxupi.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/sonakejagogo.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ecac15c17---pezufobe.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/95o6gbmep51mvqh8njigtr66lg/jituwuxebugolewebed.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e6aee7861---nemijeloxuzajofirukisimaj.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/65099210994.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba867d07fd---87286930668.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d4308a5d0---nuzowemiwuxulisovaxirit.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210614_232426.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922412d5945---timinesixuxuvagopazovoze.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/sudenokenesud.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/gakejedutazetuzosudubim.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080031bc90fe---11505503067.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0rj75bk0m6ffc4lbs1t4cfmlu2/fanifopuxu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608631675222b---putubaramubavogivudefalud.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079670ebea45---61596430415.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/4p86opclfjdt5vutta93b7itii/46610531152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=killed+billed+toucanPDF link annotation