Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7acc932348235f…

MALICIOUS

PDF

66.0 KB Created: 2021-09-11 21:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7510c1b617302e4bceed17bb3612befe SHA-1: 91844d4d5cd9fceb05465f11c607f98e9a3ffe1e SHA-256: cf7acc932348235f825e29e975c93200c3ad922806c76968861ff6fe420f3cec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6259

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 http://royalgoodviewresort.com/Uploads/file/97041050321.pdf In PDF document text
    • http://associatedreclaimed.com/userfiles/files/55765618803.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/63108095189.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/kabijugitubuxup.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9090ce1354342445bc303db92ed850f6/38685450524.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/8907369122.pdfIn PDF document text
    • http://szm.hu/userfiles/file/welajivevomajenim.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/jamazasad.pdfIn PDF document text
    • http://ymmicro.com/files/files/nufedofusinaxuvaxolobomo.pdfIn PDF document text
    • http://termocity.by/pics/files/tavisexolekenu.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/90956385771.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/22136820617.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/wafinifepofodojetotoxew.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/kuwelinawewukekoje.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/lanujepufisosijepix.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/29665237906.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/sejurix.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/24719026676.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/vesuvewolivapibakuno.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/wudojak.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/75777206133.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133329eba809---rixewolixutemumot.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16130bde0ce1f6---gusalotodu.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/kugipa.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7fa8366a6---naworawurevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=asuna+sao+cutePDF link annotation

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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