Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea89cf0f5637f8e6…

MALICIOUS

PDF

62.5 KB Created: 2021-05-27 14:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0e2f2b9964fc4d2446b97c4ca90e4bf2 SHA-1: b75f1118b6c4be870a26cd19197b3203059054e0 SHA-256: ea89cf0f5637f8e6a82b5e00515a688a9e73b35dbd040d3563099c0f9cc80396
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The document body, though partially corrupted, contains text related to 'Proyecto de educaci 3n vial para primaria', likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

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://pixomot.ru/uplcv?utm_term=proyecto+de+educaci%25C3%25B3n+vial+para+primaria PDF link annotation
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f44c3daa2ec3caa031671107d167b585/26145332167.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a926aec8801---jafoji.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a834a3980ff---18989801747.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/96390282395.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/mk7jf1f8o2rmg5l2t42jrp98o8/37306896172.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609edfa4633ad---43510256015.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/87896252906.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a01289582fc---31939853497.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/6597442144.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/33e3972d4e041062f83a9fa65612367f/43004513431.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/o0b0sbfdce8b89p5tmnuqpnava/rarude.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/pizewafobisililiv.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/41f2f0497a31741f150db6a0914bc40b/siwonagugixoforolotobe.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988378e2d4d---bitetokode.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4928f3a88ef7b93a24a9df8719db243c/76933026687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 5340 bytes
SHA-256: a5ec5da50ea6f91c48256adffeb5a697337777ee1b7d6ac188040da7ddb93b8e

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