Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba364883edd5324…

MALICIOUS

PDF

79.6 KB Created: 2021-08-20 05:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f23516edeef11c9eaa6733b088aaab50 SHA-1: 79a45332b6ac46dd2ab10b8c111930975a2a883e SHA-256: 3ba364883edd53245be55baca1c50923514db9e1b89b5fed4d544c680f62d51c
124 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external sites. Several of these URLs are hosted on compromised CMS upload directories, suggesting a tactic to distribute malicious content or phishing pages. The document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4920

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.kindspring.org/inc/ckfinder/userfiles/files/37789796678.pdf In PDF document text
    • https://ruh-center.ru/userfiles/file/96808983026.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/45700980696.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f07c382ab71---40376267420.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xomarevuxudebunukonewewa.pdfIn PDF document text
    • https://diphong.com/uploads/12859286533.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/sakovumevoxasoru.pdfIn PDF document text
    • https://palet-school.com/files/files/vitugerogadu.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0a92fb9f7cf0eb423f6a0a48365a240d/59667296420.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/29184467764.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/27c24577d4529bce5f6af7282ecaa4ce/65516046098.pdfIn PDF document text
    • http://skncn.com/u/files/32357239672.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/fekuve.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/71656513598.pdfIn PDF document text
    • https://rcot.org/userfiles/file/sobepisilosewezo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607754d02ed3f---girotezevonuginuwej.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb69748d2---43330146985.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mos7oeq5canojm31hteb1q9lf4/sewazejuvumazi.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/japod.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/kapizudumuvilokumomavub.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/66419120073.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb8a7376e---11989495646.pdfIn PDF document text
    • http://esejsc.com/upload/files/kabufuvatuvujofuvutuxoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=age+of+empires+3+definitive+edition+british+guidePDF link annotation

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