Malicious PDF — malware analysis report

Static analysis result for SHA-256 21211e352341a6f3…

MALICIOUS

PDF

62.0 KB Created: 2021-08-09 08:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd55c49d466424d8b2265ff1829e9911 SHA-1: 7c257abcdbc3e4ad862cc08d1eaccc405f705dd5 SHA-256: 21211e352341a6f3e8dc471d0c8bf6c36a5ceafcd117720427d4bbadbc03e8bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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=ejercicios+hipopresivos+abdominales+pdf PDF link annotation
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2031f8c6d6---xatakozolumumitumewasedi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3b2afcc543325f3193776f3a951d44c9/92325993962.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ac596b022a9---zezopibutepexudovuxuzas.pdfIn PDF document text
    • https://maturana.cl/upload/file/xorevojof.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/suxisawosamoxobutosa.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/13505494134.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f315c98f8.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/73872433825.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/dopv2dg0dc82e3a60o25lmbi5g/niraxabejejovuso.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/94291132672.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bbccae709009975a6181e6542eb12840/59211284026.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b9a9ff4b143f9ff7d94cdd249d6a517c/xikud.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/fopogigelojudiwofurix.pdfIn PDF document text
    • http://myesen.life/userfiles/file/10507148603.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/87d292ab3599340774e21211d321ff84/24899287359.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/93393138622.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816b711f055---xelogijoxixul.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/gaxowajojuzod.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/63258361672.pdfIn PDF document text
    • http://imi.vc/upload/files/xewukijijumaruzixesij.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6f2208107359af60618497579b11e38c/48297590583.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1623967232.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/62005639546.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8b7b1ed7c4098046719aafcff6e56611/41494651977.pdfIn PDF document text

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