Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3f3ecb4aaec7b0…

MALICIOUS

PDF

54.6 KB Created: 2021-09-02 02:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 42fe7f9708fa5f7d9396e26f2ba038f6 SHA-1: 2816933ab0c807e526262e09ba468070ac36c590 SHA-256: bf3f3ecb4aaec7b0ac3b31bf46046c8220ea0883d7520e8c89b19d0d7d2573ce
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5735

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://chcial.ru/uplcv?utm_term=greenhouse+gases+cause+global+warming PDF link annotation
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/tarazexeguzefupu.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f4ec47ff---pesubivasevetukirijewire.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/30583003079.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/18970681822.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/h22thnr26r4vd1qgt7e6u1u5vh/55731705278.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/co7im6v8m8p0koq3a7g7l457m3/86672162550.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/kujevatezetew.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/69954250073f29d4beb87ec3589ded29/dufutezedimadefuluvo.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/kigimodonaxozanazat.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/31471613641.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/pasizulud.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622999816.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/74869583630.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/5dbcefdeeaed826c05487d75ce537b95/tovixax.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2a2094474---vigusemizonetun.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/kg9eiqc0dkf5rdgs24g88v4r1c/zejovanap.pdfIn PDF document text
    • https://sanidom.pl/img/file/maximazedasobiwejaxob.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/magulisubukaredetix.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/gi2mefu5f7cme7hr705fhnjhf5/titiki.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/kipizisutep.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0pju033stciujbvt0jn4lmchi3/bedagezolowuwekilojifij.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/likoxutozub.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608653caf1856---93782791509.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/fIn PDF document text

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