Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb023ead8500dfc…

MALICIOUS

PDF

47.9 KB Created: 2021-06-22 11:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4d3bc83dc8625a6085e0c29659ad757 SHA-1: 94785e3d9946a761f8e212723b4e36728a04d433 SHA-256: 1bb023ead8500dfceeafd448b8b633849e8d8d39556edbc3b70b7c90ded9391a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URI indicators and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7228

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://philabc.ru/uplcv?utm_term=offset+and+cardi+b PDF link annotation
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7eaji8jt62lkjb9lsi6mn2ct3j/11853236825.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8af5b8fa30fc41c53bcd2118fe8c4cf5/nulana.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5206d090efeb6920649397efa5a1f07d/29448413150.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/21957dbfa60e8ff1c4cb168bb482a82b/42027826884.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/9172760966.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/85d197c34afc2e33b02040333a0e8acf/6244682194.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096c02d99c0b---ritixalilikeguguwezixosut.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5c22b5338b051e8ddf188b0e5bf767e0/ladaxomexetilog.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/22196216762.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/6500512087.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9adbbc96c---bakivupida.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/tbebrpaem3snhurdluerb9i1m6/tagizofep.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968b7956965---mufumol.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/bb1e6193b697718fef18023bd1ecdb8f/62727437457.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607792cd1bebc---tuzipujojezodetuju.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/n3areger1l02ljhh3sph3gve7m/24246172757.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080086554f9b---83365656708.pdfIn PDF document text

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