Malicious PDF — malware analysis report

Static analysis result for SHA-256 9041bcce22cc5e82…

MALICIOUS

PDF

84.5 KB Created: 2021-06-27 23:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f228929254a06718580f792a67c52bc6 SHA-1: 3450060f1c31e114b7dc2c9ab4171b0ea0d571fd SHA-256: 9041bcce22cc5e82bfbcee3f3abe701f759f1621ae3e6bce824ca40db62406a8
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5018

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://inwebjor.ru/uplcv?utm_term=percent+of+earth+covered+by+forest PDF link annotation
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb6d4b9e2c---71524556956.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pkv6rkk3i3i8pcgmr74kc0foo7/814660086.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/00a46286061af00ca896e8ea002d0e6b/zakotepegenukitumam.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/49161590260900069ef444.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608182c3b7b8f---fakelutadezupu.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/4025561845.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sebv50eic5fdsf2tdrqa9hb1m3/tanalusebujof.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/24827770303.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/qp991pnt68fo5lf0gag5l1tqu2/2628346583.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/rafofavopominakazosilimef.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dffef96bf96e0fbebb2ec33d6fd9f20e/muxeperimabeja.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/mafapisi.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/datixuwumejesoxufo.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/36937295875.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/wejusesivegilibetavaponet.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/jirasafoninalebatokiros.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d0087ce931a---41610381865.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0r304dgr2jhra9uivlomaoa915/dijiguxuxol.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-17/20210517104422191707.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076737bdbe7c---81839352092.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd0f79ff8---77436088814.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/fb71ab6dd5470706aaefef21f6fa8a2d/41127888799.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/monaxokitodabasikowepado.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1bd02f470---96061939214.pdfIn PDF document text

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