Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b43c82072d13f86…

MALICIOUS

PDF

61.0 KB Created: 2021-09-06 23:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d5bfbb43af7e8977d56fd932eb68455 SHA-1: 195952fd6b7bdada11268a37c74af8e889aedf86 SHA-256: 7b43c82072d13f86ec2cbf8a4bc8f677ae8c885ccd5606ddeb9fb500e094549f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5127

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.tzounakos-insurance.gr/ckfinder/userfiles/files/gifobimagisemi.pdf In PDF document text
    • http://campfirewtx.org/userfiles/file/gakalilat.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609accee416f6---nosojobetagiteritenaxemo.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/23167820097.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/20651007458.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/j4g6bdmi2f4pc19f5r2lkpsui7/66507401262.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a32de62dee0---damerivizizabufigut.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/17175484952.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/sepavivozipotovofateme.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/425878a64d65204ba32fb6dc5bf2fd83/pabezejuzulusa.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/68979498297.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/tuvet.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/6921079306f98366bea2b8428d653c64/femowulonesebawafu.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/93072376535.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/33410838454.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d4bd45a89---65994295532.pdfIn PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/62255088318.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090f15a1a6f5---xoxikajilemeru.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/52467016787.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/94786026712.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c770e927a---fezozexidojizax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=translate+pdf+english+ke+indonesiaPDF link annotation

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