Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1e2929056cff7b…

MALICIOUS

PDF

83.0 KB Created: 2021-06-30 01:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 72879ce6c7fb97b956e609aad355915a SHA-1: 0beb4f193bd6e233bc9cc56c1983cc1f086bd9fd SHA-256: 7c1e2929056cff7b1398dfff05989cccd1fe097ea6fd6668bb900e5fa662a2a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5862

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://laborke.ru/uplcv?utm_term=regular+expression+in+toc PDF link annotation
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/8fda0c5bec1e8de40e3ae6835231cf43/badifudakojokuzo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b92d0465---21776172229.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/japs0cre72rv2n0tbctjr0cdep/57443513542.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/214649331560a1773f34d7f.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/rnnkett7ntp19000hkfhcfo4g3/61676739311.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/d543bef0bfa8b4bae99ea16f89b43de1/13915723760.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/18531264043.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8dea48c6---62601624511.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b01bfc8693---jikoxotebezomukulipugom.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/ruderirupusikotizarogi.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/lipasufizixiwujovi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2fea2000---66045186596.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa071d60813---54692803475.pdfIn PDF document text
    • https://banghenails.com/upload/file/89737807681.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6228077b2---84086887466.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16200883524943.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/jovuwadaforakonujuxi.pdfIn PDF document text
    • http://ahchala.com/img/file/sefidakudilofixonopus.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aa4262867---95765032673.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e27bfda230ebe4b667a1ed4a5c5add5f/42432803372.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/vobufuve.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/43537070568.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6394258e---mupujok.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/9a9abf104b82c95aab9a51180a66d71b/doboboporasujiwu.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9b39f1690---zojotexuxafelowigenanowus.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 20076 bytes
SHA-256: 8d956088703ab51bbd8c868257894efee5de639ec7fe848cb48403f4357efaff

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