Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc068552a34f57d8…

MALICIOUS

PDF

54.6 KB Created: 2021-08-21 10:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a0f4274dd3b0634ca400d4517ca52dfb SHA-1: d65ea06e255295f7d17de07fda39228fd6924a3e SHA-256: dc068552a34f57d8033e01da1c4c19de01d4e1f07ea63749827f5e44a34a3d1d
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 a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of external URIs and link farm characteristics strongly suggests a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9413

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=life+is+strange+comic+book+pdf PDF link annotation
    • https://jagominum.com/contents//files/jesolujawa.pdfIn PDF document text
    • http://peoriamayorprayerevent.com/clients/1/16/166e3f524b51ec168ebfd48f86188a1d/File/34998111908.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/kc3djkgdu8irccar6qlh00j98q/72738136637.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8718beab33---gamilito.pdfIn PDF document text
    • https://bioesteticaonline.it/file/zidebomelid.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160872a1d7e742---5505807647.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/bezojaxigu.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/natepinulivoba.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/10442792912.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/lejexefagoseleze.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/5305264255.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e205c8c11c0---71833174339.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/wodesolebasixubelub.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/nijap.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c880a1adc0---23280328818.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/62938274920.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada1b3c256f---2198931207.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/1294289937.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5761c046bbeefedec33e20cb3c8f5a96/dosodagovurelatove.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/373536792.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/wajetakovorekagidireku.pdfIn PDF document text

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