Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a1231d980809c7…

MALICIOUS

PDF

86.8 KB Created: 2021-07-04 03:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6eec42c99a9d513cb665528e1a4e9104 SHA-1: a62328a9b5a204ffd75af88f156d80ba5ff7c090 SHA-256: e1a1231d980809c7d000328f51278f181694cae27a422bc9801bf86cc3bdcb67
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF sample was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It impersonates a cloud document lure, directing users to a link farm hosted on compromised or disposable domains. The embedded URLs suggest a phishing or malware distribution campaign, likely aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://crysiq.ru/uplcv?utm_term=how+can+you+see+blocked+text+messages+on+iphone PDF link annotation
    • http://tubietelbar.hu/uploadfile/19499191448.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/pimeduvijekefub.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/wugadak.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5ders0oogr40figqrttkd1lui5/27267507764.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/retujo.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1af9f5f766---77909158988.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4qg8tcgmt3gf182s658b6lgcgc/86520160194.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cac43bc5a---xirokuwoniv.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/2605751188.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/29a34f2d043ef4d33dd3011a70ec510d/xarufasekosusedogiguguviv.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986e8d09686---56622497644.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f68a37e70f---86185915746.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071258046e5c---99103370400.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/vivesisuxubidade.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/84445590557.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc919cf9c5---14231342358.pdfIn PDF document text
    • https://windsbs.biz/files/file/wosoginabokex.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073c29f75aba---46824503754.pdfIn PDF document text
    • http://poorclarescork.ie/images/relesifususaveberefim.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/vuvukurupefavebozabe.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/1cb98f314855e272a7a9240fbf7a8aa9/bonomigerekoja.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/e149oqei8it8hvntct3cdcir94/samed.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_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 11484 bytes
SHA-256: 1472543b829dabe601f2976a3afbc87ec30797ad9de337be0fcad9c8f997413a
font_02_sfnt_off00012073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12073 17240 bytes
SHA-256: 87649a6d2d4d1e2eba26c65ffedee1af333e7c9e97709b92b35ed5d1f3834c20

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