Malicious PDF — malware analysis report

Static analysis result for SHA-256 c885b00d150bceaf…

MALICIOUS

PDF

43.8 KB Created: 2021-10-10 10:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9a775ae017c82195c7dc1c1cf404f54 SHA-1: 80549c9da83ba2533f754988348dbe0fb99cc811 SHA-256: c885b00d150bceafbe4c7b21e4e7de2aff7b4f390ea7df6cf19f4fa025c068fb
154 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads. This pattern is commonly used to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7422

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://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/4hbepflglp1le7hf22udr4rhm9/44490613732.pdf In PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/vokebudekeboforezavuguxen.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gavesifofepegudoxijo.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/dowejolidisurozaretaki.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/moponakufewokot.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/94013192694.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132bbd973e72---nuxipexaxowukurarew.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/94826595497.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/24527987771.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/komuzawagaxa.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/kuvamizarufasefivo.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/911779838.pdfIn PDF document text
    • http://parilka.by/var/upload/file/62116235198.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/11795018380.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/28911837154.pdfIn PDF document text
    • https://lapakunited.com/contents/files/xanufolofolojag.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/50212995714.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/b32e79e85de2ad4da427f7c9dcfbfe17/18981884681.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/vaperemosis.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/1333207109.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/minafuxoda.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/burivabidigovesugotumep.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/17868529635.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/vilemurexukukixajibebuj.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/bisuxujumuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=practical+organic+chemistry+notes+pdfPDF link annotation

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