Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bbefd830a62c89…

MALICIOUS

PDF

86.2 KB Created: 2021-07-01 18:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3caaef2b331d70ed2160d5c10791b59c SHA-1: cec10c562dd5413cdd8ab345df2e0bad13db0273 SHA-256: e1bbefd830a62c895eb2298564ff0e05458b076a96c23124fad25570fb76d698
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/7020039f74982244a142c33151cd0c98/mogaseteguxomavobu.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/9er3i6nu9qqjtfq0n8a5qoqf1r/99478609254.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e969aada9---zezatepajejakefemeki.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/v066c95o0idr3mb4it2fomssa5/79533223482.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f26277ee---gitorifojami.pdf
    • http://apluskleaning.com/admin/images/file/38281786293.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/fozanutexilujexabewo.pdf
    • http://ajtoablakcentrum.com/_user/file/sulagefevasew.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3ba9dca108aa90037bef6dd7a208cc20/gabesijakezepexuvaxo.pdf
    • http://aweibel.com/Photo/file/93165745781.pdf
    • https://silga.ca/userfiles/file/losizamunonojiwazikoj.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/706j2i1lu47b019a50hsum8h00/kodutewuximetijebixomum.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae8966ebf6---bipanub.pdf
    • http://meyras-tourisme.com/ressource/site-image/files/dolukomenizororutukiba.pdf
    • http://veterinariogiardinelli.it/userfiles/files/jilelefepewezomusidaw.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609d42bb43140---vaxarubanugilodo.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c02c98684ba---mekixikuw.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a84d9e84---zekanupi.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/51545152990.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b14d0657a---zibuvagaxitowozivijutof.pdf
    • http://grandinhr.eu/images/user/file/junukimetokovujaborimap.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/3c52e0d0713341a8b4d2d71aece14304/nomuzovibosej.pdf
    • https://al-farh-iq.com/upload/userfiles/file/4261817871.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072575f85840---zadikakunodinazulo.pdf
    • http://55thocscompany.com/clients/62662/File/57618671765.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d6295008469d4f7ed3e3cd385fc3069b/nukifug.pdf
    • http://fra2ange.it/userfiles/files/wimowefa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dilated+to+a+1+and+50+effaced
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2e.bin
b6077cd3b2bee555b88ea712cf9d38317c2184bb8adde4353f1c8010725abaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 16992 bytes
font_01_sfnt_off00011b31.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 16792 bytes
font_02_sfnt_off00013348.bin
a5a779e4ada64f1c5f1c6c24b45bb73933f9b7dbc9b24b6cf32f8e77f86a00e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13348 10512 bytes

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