Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec6cebb3a38c067…

MALICIOUS

PDF

54.2 KB Created: 2021-09-03 01:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e922027d68e24a3edd918c718ed621a9 SHA-1: feacd3129004388047fee6dce8495d2e29a77fd5 SHA-256: 6ec6cebb3a38c0679e74a6b4c266d4c1946940891bc5d718e1a9c22a3ecd6149
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8347

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://nandeestationery.com/userfiles/files/jopitoxoxewonuregixis.pdf In PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00a70cffd---49916822653.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077332cdb216---65663980299.pdfIn PDF document text
    • http://klpa.net/userData/board/file/71404015837.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/38005873025.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f16d5802f984a5a4043cc5dfbc104a50/43798861225.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9939c977---puxugilawanedogugefaseri.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/1896482993.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210703112459.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/80241101787.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ccd4da6---lugijuronokuvegugugeg.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/3313426373.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160855a74a9151---54331981742.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/45340205826.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/21362504641.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/ramunukepigig.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/malarugu.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/11575224631.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/64000819690.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160de573f9deab---fafivowijolulagor.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/60852779212.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/vidunexalelakabalewamezin.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/bamazofugurixip.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/82067061230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=formulas+del+movimiento+parabolico+pdfPDF link annotation

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