Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb59869a3212e78c…

MALICIOUS

PDF

58.6 KB Created: 2021-05-25 11:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25c0466c09e1b53e561e1191f54cec9 SHA-1: 1342f5d0e5b9aa8e05a0f8335216835faf36a913 SHA-256: eb59869a3212e78c6b3be2e3101ca9f99cdb719bebb9f2c9aeffae4d52db695a
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8481

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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3e66bd15---nulinuvenu.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/69d0afefb6970e0acabe98093f8eae8b/golisivimutepeja.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094416b227ba---gamaworisifesorezepuz.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070788e3d346---13220887362.pdf
    • http://agnieszkapawlik.com/userfiles/file/gosivis.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/kjr5hsru33u3nbth7m9d8uujof/pitududapevirabu.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61f961dd1---52115335634.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/2b2755af36ceebd9a600e921ed1856aa/mozakasekemunu.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6190e22c---juzulo.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/7130d3b4b767b1104c26def9c5c8cd04/xetukemumetajexadara.pdf
    • http://simonide.org/userfiles/file/fobosirunibofukuxozexuri.pdf
    • http://asiadomainstore.com/userfiles/file/disamoditazigu.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609744ec28117---87483742663.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/fb3b7c283d6eb7aa3977d4414b41a153/vidogi.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/9oumsql6844emcq0qud3kn8il2/fetejulokola.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607473f915928---kajolabevigoporole.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6b81227b---37322283650.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/04fadd6eaf0f744b9cfa839dd782cc80/51787260998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=strike+force+heroes+3+hacked+unblocked
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d907.bin
0acb0f20f40b93a0c696d8470b8788ca21c47ffff50ef9d77d67cd48ba85be13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 5580 bytes

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