Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9cfe56b03f1139…

MALICIOUS

PDF

149.9 KB Created: 2021-06-24 05:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: adde3bce5a64dfab8608d5f3ab20da78 SHA-1: 575220fd7e6c15a2a7261545433b74e9de4ad563 SHA-256: 7e9cfe56b03f11399b99bbd17eca10f2b6c5fe18412a113ac59df7d66c9d84ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external resources, many hosted on compromised websites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, and the ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing lure disguised as a free download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9188

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fba050a2b---tolafiwujijesufoz.pdf In PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/586e1be4963c883b3b3e531b3f2d7abf/kagesabujebidurow.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/boxelixasafizaxigi.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/35058413169.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/15433937111.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/408a27dce4b871ed67c5370cef09001d/zunijujamivigefaj.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/27295231696.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/42783210026.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/5d9a64460ca3ab1fab0f48a8dfe5ea06/loselagokit.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a1b5b1d678e3e491cbb3314d5b209cc7/muruvibonitovewenupipeno.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/75532916259.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/78748264655.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819be89f680---93975607767.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2dd309544abb71e6d7fbef360152fea1/45758376486.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pde29v8c10mdke77orqo6o7sig/fuxujisexomubik.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/6lbi8gq4bj108a37gnkb751e5u/pusomi.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/tuwazafovijiwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+orthodox+study+bible+pdf+free+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002369a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2369A 3352 bytes
SHA-256: 22496aa58118bea9b58cf849a12beba8933e537413a3b2637f3e12f029b8dee3
font_01_sfnt_off00024281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24281 5480 bytes
SHA-256: e0d6c70854c5b466eb69b935d5aa65fc78f82e2ad632f4b29bdef1af78f5cf40

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