Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d4c1e9bec7f8b4…

MALICIOUS

PDF

105.4 KB Created: 2021-07-03 10:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1c4288d413c88db63cca14a103797581 SHA-1: 9c2857568a5f154cb755f58db3050e99d960d31f SHA-256: b9d4c1e9bec7f8b4a45be44c0a70f8438677f6ffb3bb1d4a6bc291db0b14c21a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous websites, many of which appear to be compromised or hosted on disposable domains. This suggests an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5653

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://asupuro.com/upload/save_image/files/30937956885.pdf In PDF document text
    • http://thedewakohchang.com/image/upload/File/ipupokodujumozoku.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4977bf47b---44413229227.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/36162058384.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1cb741f39---37957048533.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52d40f379a3d8317c44d5f388a534656/legemifuxusezara.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5334ba841893db579c8de858579d53f6/repabofavujapirirasut.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65160be2d7---85236542408.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/45209257977.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/3sfgqh9ftf8t87dto9hhum6mjc/55354063260.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/22722419781.pdfIn PDF document text
    • http://aimic.com/userfiles/file/budexesimonaperi.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/97324085413.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/sivamexisatetewuwapagok.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/93378601701.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c810dba354---wawafivumajosabesi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089a53e84dc9---52208418836.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/90651262438.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16071efd5dec51---63927823163.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/kotobaw.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/soxav.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/79493774792.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ecbf039974fc20212068487ffbd06847/18940534866.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/9tln659308raag0c0bi19hd5g8/92603608027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=antisocial+personality+disorder+symptoms+and+treatmentPDF link annotation

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