Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d1e827966a358f…

MALICIOUS

PDF

79.5 KB Created: 2021-08-29 16:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f681687c11b83f7ab74c326efa9039f SHA-1: 60c46fb6bf0b6f7b372c12111b21a514df84c8bd SHA-256: 94d1e827966a358f437ecaeeb62c9c0ad10ad290761f4a2f75d57c42cf4ca036
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=the+time+is+near+bible+verse PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf3e059058---27269537925.pdfIn PDF document text
    • https://businesslife.com/content/file/diselove.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/retipupunamigaxulavufede.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/vozofivolalikigakad.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/66381468342.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/5978475965.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b3925ff74---48765254768.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf218f9ab---82314223363.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bdc96046f---zugokakusikir.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/50285151076.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/mogovekugogexaj.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/megusanitomujuzavele.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fedd67af8e---badimibudatid.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/nides.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6968559ab411bc711209f7c2258b7dcd/sunemanuvefed.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/63112430222.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083764b3836e---6962890978.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/muvurufefagolipal.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/15749089739.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/hc3tudr1p23cr08c09l0tp0or3/gikerolezabovarusugatuj.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/pepasosazivutosukopebe.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/06a23ab94ddd471a594a4cd35ee7a93e/runidepufawofurijanabewir.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/tn3ofgc671fj3vl1der4ojjtra/54319008005.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10420 bytes
SHA-256: ca3641fda21d7a7f7b4e7db4b6eaaf92c6e5ac17e6c3d9ce6407b1a2e9bbeca3
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 16640 bytes
SHA-256: cce35c8ce61d5ad3728f81fdc7e86d5cb256727d155ccb105f8475ae385e4d69
font_02_sfnt_off00011813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11813 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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