Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33b598815190c3f…

MALICIOUS

PDF

56.1 KB Created: 2021-09-24 00:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69872863b3765bd2c3446f24fbad842f SHA-1: 11aed7c307217be4d8acb81f32f0fa9e3bd1c033 SHA-256: c33b598815190c3faceec4814820345b14bfb38d74c9090b8dab384ce6dbbf64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://nomylo.ru/uplcv?utm_term=tower+defense+games+apk PDF link annotation
    • https://vicareyou.com/userfiles/file/67499095505.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614c36ec4e0e3---jemavifop.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/xudenilojanetapiwa.pdfIn PDF document text
    • https://kueapem.com/contents/files/ranerawa.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/zafefiwaj.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/72bf976aa96eddd055bc51e80bd82605/42411555477.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614074d09bd76---94112463841.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/dafoxejewidegojofezakivi.pdfIn PDF document text
    • https://bselink.com/userfiles/file/bupoxujijubasufulumipo.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/47304226534.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7a7c0578c---wujezetinafow.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/lasilobo.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/lokuvonajeduvumuzu.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/15316207950.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16141b2c4beaea---lirofabusow.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/14895848787.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/xewupevoresaxurapij.pdfIn PDF document text
    • http://babamoleskine.com/files/file/67649973675.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/24016325134.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/xabubapigulijo.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/jebokakimawonida.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/26228914368.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109120632526964.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/19097038121.pdfIn PDF document text

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