Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb30c39cde242c2…

MALICIOUS

PDF

47.4 KB Created: 2021-09-16 18:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e19a980c4d8e940e42d691194f95e35b SHA-1: 495528adbc4ec72bef42ba6690975d50bec7369f SHA-256: 1bb30c39cde242c2ef83d60e402f776f3dad1d05454efd7d76aab56111f60427
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://cargotavio.ru/files/file/musisi.pdf In PDF document text
    • http://romangruszecki.com/uploaded/file/89426957079.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/42332848687.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/sezelewejokupegixefujavaz.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c883ac747eb46678d81a11f0f06959dd/1042770209.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/9550503923.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/zorikudurep.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161430e32943b3---60459109362.pdfIn PDF document text
    • https://sieseam.org/userfiles/files/juvugizi.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__613D01DFCC730.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/kepadutuj.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/bubumadiritemilenezifas.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/55940517479.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/46759711769.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/tedebekovevinub.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bfaf43f9e---pemabomidomuxu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/f8a883b6ea8cc7362efe391d27022b4f/6724001144.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/wesenevalubunalek.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/84551510698.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210909_74CB4E5F76D92C0C.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/wopiwoworumogibi.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/2980434898.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/dijipurejoxijepamogo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d6adc63b6f3869c1c725d88dfd86cc7c/67181351642.pdfIn PDF document text
    • http://atanasijornet.net/uploads/ckfinder/files/xetivifiletozoxedukorimal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=editing+app+inshotPDF link annotation

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