Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ee35c590d8dc62…

MALICIOUS

PDF

61.3 KB Created: 2021-06-11 02:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34629447ffe82b9102e9abe404a8ff21 SHA-1: ab45774a4f438995527c16514fb0c05a506d705b SHA-256: e4ee35c590d8dc62ea2c05d244982404cbb7d38a833e4e54a2936249a0309dc2
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. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8211

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://nomylo.ru/uplcv?utm_term=extreme+car+driving+super+car+stunt+mod+apk
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940ad856049---tukigexata.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607df65d6ab62---rafejegudabebe.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ck7ksg86mg7oioamd78ef6405e/fezexijatologanatoxaso.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757485bd057---56508606063.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706c6f1f2d6---41517069511.pdf
    • http://chi-kara.net/userfiles/file/54000252539.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee15bed1a2---kuwigamidekasaworiluliriv.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160757a3429030---93633867482.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fnd70bhr76vdekl063dm2bv641/banixexojexidominarifeva.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/0bcm37h5jviep3ftqpb91ghpq4/81136119455.pdf
    • http://mispuntossaga.com/campannas/file/64225368747.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e33460d8---favasepuwenokiju.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/i5pgmboa7v41cs85namcg7mm30/51469995483.pdf
    • http://adabaskimerkezi.com/upload/file/wafobumojipinotepobofopux.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9ac4856a8668df6203fc45ae1b917f10/12586315447.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2624a418e2---79295293202.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bf.bin
282a448577d97c14e40a3790e81b48bc5582f47f37b8c1b3cfc8a5eec16807b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 5508 bytes

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