Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51e35806ee2273e…

MALICIOUS

PDF

54.6 KB Created: 2021-09-19 01:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7c1c69bcdb4a2115a4a0954cc4e8efde SHA-1: d327bd5fe2606aefa40f0718ca462e2aead6ad0a SHA-256: d51e35806ee2273e196413367ae171505989e1d3f78ee888481e0ef948c7b842
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4703

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 http://kidneytracker.com/ckfinder/userfiles/files/tugajikome.pdf In PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/18131995980.pdfIn PDF document text
    • http://rrarental.org/upload/file/fosukebemetufadarugi.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/56526686950.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea7b3b7ff6---gufigasozugiwulebaf.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/kurozoju.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/6164b843a7f694c5adf01ba1ae1830d2/71102235822.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/21306770490.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/96588355844.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f215bf764ec9a7a80d1e34e68f63493b/vuduvavituxumovalakoba.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/01ab14968993e4324901eb45fb821b4b/tijapilitipevusonekad.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/53968931552.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/12583536731.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/mnkdi6tgjr7p7fr9tap3pqt0q6/relupujudoposisavirog.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/papadofosejidi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/28717567635.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210918_E4D1F62C1A8683A5.pdfIn PDF document text
    • http://vtaky.sk/media/file/33825592287.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/48590160659.pdfIn PDF document text
    • http://dfanchem.com/upload/files/84469058559.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/lidagogupew.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/babofabagavanarejajamizok.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/90927098983.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/gusugemotomokoribiweza.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/didexoxaxefiwuvuw.pdfIn PDF document text
    • http://chemicalengineers.ie/images/kapufogeripeno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+put+music+as+your+alarm+on+androidPDF link annotation

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