Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb71d9bf558bcbc8…

MALICIOUS

PDF

62.3 KB Created: 2021-08-03 01:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5c42961a88875715fb05b553addf235 SHA-1: 75bdfecedcce5a92f1887db32cc96cdb5926f311 SHA-256: bb71d9bf558bcbc81c1ab2a6bcb247a72146f604d3c8af22148a7c8b0beb7b09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to facilitate phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9446

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 https://pixomot.ru/uplcv?utm_term=xyz+file+format+point+cloud
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/75d4c32c7102dde5fbf00db6f25e602a/najizulojeja.pdf
    • https://farmaciasacoor.com/site/upload/file/75200409614.pdf
    • http://ruoumoc.com/upload/files/losiru.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/bqfrfjq4k5crukd60ea94rndlk/34454227598.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/glvt64fu1u263g34cfe6m46me4/zerirutesowisobezuvepu.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9d94863b---xexidifapawobesig.pdf
    • http://ricarda-allegra.de/userfiles/file/76444400789.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69eacbf8ba---jaxilotafalasizaku.pdf
    • http://ecohouse-lab.com/userfiles/file/21193823387.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9c310d5130c9b71e64dee40ce17b35be/rebibobova.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4b49815e---kamokazilokedeguf.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/fe5c12ce26effaf11b20e8a701a95497/88088618833.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c319a6aeb29---xujas.pdf
    • https://mytopics.it/uploads/file/piruxefawokexifuz.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b038a81e20---34094207321.pdf
    • http://irs-messtechnik.at/upload/falufoboxeb.pdf
    • http://agro-vostok.ru/userfiles/file/fumurumeboxizijopetewamat.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609e404b3d7a9---folexedajepobida.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c934f8b2abf---97275857450.pdf
    • https://path.mn/userfiles/files/nufoxuzap.pdf
    • http://trips-in.com/ckupload/files/fipeberedifato.pdf
    • http://cartonwrappingmachine.com/userfiles/file/6655601611.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/41f412481f3e16934fca4d5ff1cb6367/fanopodovitagoka.pdf

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