Malicious PDF — malware analysis report

Static analysis result for SHA-256 2558cdc0911e36e1…

MALICIOUS

PDF

55.4 KB Created: 2021-08-12 01:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d18b35411a104e1feb02d54873b34860 SHA-1: bc6bdaa07509981686f58aee8ba696683f623379 SHA-256: 2558cdc0911e36e1023d363d96bdc83ba002747bd7e5aa135c2801aa116cea8d
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 websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6128

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://mclarenquartz.in/ci/userfiles/files/66451887783.pdf In PDF document text
    • http://www.cbs-emballages.com/upload/file/25009089773.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/nitixosonibulif.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/96931038611.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/goxorogezazofag.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/15931733043.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9dc545ce---60961447904.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/57918830971.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22c210e3a1---kajezidizaw.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nq1op8ic7s8vblkd6qvj8n5a7p/18270643560.pdfIn PDF document text
    • http://gangwontaxi.com/FileData/ckfinder/files/20210624_2FC934B02BBBE1D1.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7befd76d97---kesomober.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/16094499462.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/d4c9e5ad43276d03cbc2d7aa034fd00a/77212001910.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/3269276870.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160711b2839c31---bivemilirobil.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3dd52bfb9---tilesudediwidowu.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/wupuwideke.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/28315267673.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/10491995823.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6aea1a6q1qvv98r4j43hsu0ijq/91390161513.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b8c12f2d---33948832511.pdfIn PDF document text
    • http://msiutilities.biz/documents/rawepimedebitij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14fec33e8---kikamepumabapejulojun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=como+unir+dos+paginas+de+pdf+en+una+solaPDF link annotation

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