Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef017999f3d9d61…

MALICIOUS

PDF

77.2 KB Created: 2021-08-30 11:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b83b2eb02077214be3ccf4bef43385e4 SHA-1: b7c16f27effc6d28ecb9f51b8d387e1d7ddfe2a8 SHA-256: 6ef017999f3d9d61a7db75bd9ce1bf351be2b37ee9eeb14ab50b4df8ff48afc6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a malicious link farm, with numerous external URIs pointing to potentially compromised hosting. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution intent. The document likely serves as a lure to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=how+many+pounds+is+46+ounces PDF link annotation
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86479449439.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/desoz.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/04374fb471b0b11ee25c2455f603a269/beginusimoxexi.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/29836512294.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/luroduf.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/26645290313.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62fd30c768---zorunawevafokoxadut.pdfIn PDF document text
    • http://www.heksan.com.pl/file/nojixovuratejepojanas.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/wolapokixirobilenene.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160efe5f56fb0e---zofixugejebozu.pdfIn PDF document text
    • http://asustainable.com/global/file/nerisikegemidov.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a450fe34---tarivazosafemovepu.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad8b91518---96502803606.pdfIn PDF document text
    • http://feminella.ro/upload/fck/8806945454.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/75164028354.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/312h0526k8mkmp765815il26al/bujoxopadofudirolalaxe.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/pamopavedirukaluvijeveva.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb639d82b2---dodaguzovununopugusozokox.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/nomizoka.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919b587feb2---jasogu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/pukenurumenajopa.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/50917344284.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/loretejinebinuzimaxotigu.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/46623540137.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/h92mdaf0t2cdsnb04rh713tis4/18539402756.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_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 10968 bytes
SHA-256: e342313ae1d399ca3cda67597b8c490be9fc0a40e2e9fb9753736c0956046912
font_01_sfnt_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 16420 bytes
SHA-256: e0587dbfaa9483b9a822f9179924541a1469d7a7e083be98f0892f8fbe87e800

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