Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af4f26eaa3b2c94…

MALICIOUS

PDF

46.8 KB Created: 2021-09-02 01:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c7722a33514f8b79d27b5f21039b7e2f SHA-1: 63023655586d588b803331dac1ac4fef2bacfac5 SHA-256: 1af4f26eaa3b2c94e8fa382b3a4dfb520547e24dfcedea373f67d9706d054971
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute phishing content or malware. The embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7344

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.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4l4oeh6nj0c3hpai0r324ieaqt/zipenikagexixomatezejilam.pdf In PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/46997611577.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/42454d7e76674148c97e4e5b387cdb21/rubuzamarok.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/eae361870add60fe1cafaa2ca2dcf2d2/88778006983.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/nuvopem.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/jutomotoxipogupa.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161108ee6600b9---fiwosowekijedim.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/1711524456.pdfIn PDF document text
    • http://18554080.com/userfiles/file/36064482947.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1611ad28f4ad33---18431368993.pdfIn PDF document text
    • http://come2menorca.com/images/file/pebizinukajunezimesa.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/jetirilad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=early+signs+of+schizophrenia+in+childrenPDF link annotation

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