Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aaeba69fc0b17c4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 05:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b2d5674394457ff848ab7e406d03504 SHA-1: a000ec56dbc73f0ec387c7da6a0cc854d25339f3 SHA-256: 2aaeba69fc0b17c4727f68b65af2b211ff6369d3e37751aa09d92693f2676e41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a link farm to redirect users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://coretry.ru/uplcv?utm_term=professional+valet+near+me PDF link annotation
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6a3c28c45---64849366175.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/lumob.pdfIn PDF document text
    • http://foxdigi.com/userfiles/file/6632879650.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/jesabapukuroxemetefud.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/tinigavifomeluximo.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/20132590946.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608935a0c0e8b---vogawugexanudibisowepov.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/10683572795.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/r1n3u9ajo70rm3b8euqam9c6me/99284743347.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c863aa96492---pugineputofujanet.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/xeroguguxagababesa.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0723786d8b909632f477b0a6b6e341f0/rodinaxin.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/lewogemuxolebikotezuwoko.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/h9u14tdh0rn0333skg9sihe9vk/buzeginitofapef.pdfIn PDF document text
    • https://seerupit.dk/assens/file/jusowatenufukofujurorik.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0b9ca5997---batotawotosekina.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609189e03ee62---vurawav.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/27742944610.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4794f09083---30647350537.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e22c127ab4---penekenarejal.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/jolazuxowulexemedemedip.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/suxotuzelopapovan.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98366085319.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_off0000d2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2ED 17588 bytes
SHA-256: fd80ed41d41a7ac6af92b2e738658e5c4117906b7755153d7cdf73de3fcbd8b9
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 10440 bytes
SHA-256: 6ec5133349e3992e5e9c76ae28dd11a49dad2a93366157d1945823de388f24fb