Malicious PDF — malware analysis report

Static analysis result for SHA-256 24922b17a857ba44…

MALICIOUS

PDF

85.3 KB Created: 2021-09-23 05:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d4906253c0f19f5531235b4aac168b2e SHA-1: 9316680f6b9ae5cf803f1d1d10bdf9ea1256c4bd SHA-256: 24922b17a857ba44ba7fa5e20bf99be3e37784265eae13c3fbda8462d49bc551
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed to direct users to potentially malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=clipclaps+mod+apk PDF link annotation
    • http://ehomeforeclosure.org/images/file/wifera.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/loxapivujuna.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/89163783222.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/44054628068.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161352d159bca1---49663898049.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/78809454343.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140130a8506b---12246313007.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca996fe28---99592609200.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/telufazeri.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/21022114434.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/3573503451.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/nalimotifexejin.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/gugazimax.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/42307106381.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/sasavixur.pdfIn PDF document text
    • https://ms01bet.com/contents/files/43089098027.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/debudisavuvijukezez.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d785eacf398d98054b605f45cf5df0d4/57171810192.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/zoxofunesopajutepazeto.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/numunepinibejebidi.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/tunizavavilopavubikuwawes.pdfIn PDF document text
    • http://gosapahostel.com/userfiles/file/xajonekesulogo.pdfIn PDF document text
    • http://saaretravel.ee/images/file/71689496174.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/25134151867.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_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 17776 bytes
SHA-256: 35b6b66587b58d83b10bcd6455463bf0858dc76aa2af395d032bcec3d86cadbd
font_01_sfnt_off000117e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 10364 bytes
SHA-256: c69cd9bc15dd2d72301f96ccf02a36c008069fe222008141b6f2d7ba00d0e9ef

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