Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d667df501813e…

MALICIOUS

PDF

43.1 KB Created: 2021-09-25 11:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1393278a7a3da0e25310d216c1d6129 SHA-1: 8021e173f3300cdfe6b415fe713ac850e9e11605 SHA-256: 495d667df501813e2f7a1a27c8dbd5daa726a3165541b320b6f485e4b21ee38d
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised websites. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6587

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://highdesertrent.com/newsite/images/uploads/file/64019812353.pdf In PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc8a396ac---87811842807.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/tasanejevofuxi.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/81480126257.pdfIn PDF document text
    • http://scpt.it/userfiles/files/nerufonutelovub.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614af3a1c3297---gulufakojesemuremukuwor.pdfIn PDF document text
    • http://chinahongji.com/d/files/bizidux.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/14113309273.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/10677047278.pdfIn PDF document text
    • https://salwangurugram.com/files/razixu.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/jixegaxibatexigit.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/797dd515e224c4f3e82021a6c796cd31/vugikekelovipexewule.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/10237185215.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/zofigibi.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/81731863392.pdfIn PDF document text
    • http://limoride.net/gallery/file/29116023575.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/97566405975.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/92380716363.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/pumomobezutoguwosemot.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/63595435803.pdfIn PDF document text
    • https://turystycznapodkowa.pl/userfiles/file/87001395037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=latest+android+sdk+free+downloadPDF link annotation

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