Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e1028c62a05082…

MALICIOUS

PDF

56.4 KB Created: 2021-09-11 21:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5edcadc9b51cb752808bc7b17d7318e2 SHA-1: 5d033d3a19c1217a743823c9070181a921dd3735 SHA-256: e4e1028c62a0508209ca83212f7a902d25c907dd98d40c3e8f68dac5fe8623f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7436

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://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/65526734555.pdf In PDF document text
    • https://worldmedglobal.com/userfiles/files/gelugizosak.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/xetebufiliv.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/xefilefulamesosutal.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/87352171272.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/nonelunogelejotet.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/49671723387.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130df83e2459---ziwoxeweragawibi.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/1785450924.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328e8680a0d---33272959176.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/rorogovasu.pdfIn PDF document text
    • http://biomehl.com/images/content/files/lixod.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/bivikamoriketeno.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134eb390829d---47911065936.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/sofajaledaranudagum.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/29583615916.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137c1eb3afac---3199081873.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/noberivuzoramisovi.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630587750.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/bogovukoguxitutabelikamiz.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/43784527804.pdIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=nucleus+found+in+prokaryotic+or+eukaryoticPDF link annotation

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