Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3092e711cd002c2…

MALICIOUS

PDF

76.5 KB Created: 2021-09-06 12:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 257fa9426f967cfefd07ede82d3af00c SHA-1: cdfff8946a1834a58d97ee4476ce326589e76f2a SHA-256: d3092e711cd002c27987a8579bd9cc14c53afaacbad53ddcbf517aac4f5b231e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The heuristics reveal it functions as a link farm, directing users to numerous compromised websites and potentially disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://medvor.ru/uplcv?utm_term=sustainability+marketing+book+pdf PDF link annotation
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/kezafixozigegetituweno.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/ziginitukixemet.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af66a1d5506---lunevudisus.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/67917316971.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f668cd2fcddee8b5305768de48e21d91/78138140552.pdfIn PDF document text
    • http://anupbolivia.com/images/files/68734279745.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d91f8096d---73742839945.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/2072653334.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b171dd14c11---49803304351.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/567456030.pdfIn PDF document text
    • http://hzqzg.com/d/files/68429563339.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/gigilapopinubesapax.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/faneros.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/81487646211.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/93dfdff6395c73d288181b8fcb96522f/93305951299.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb87a2f056---77223821207.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/gapitepuvuruku.pdfIn PDF document text
    • http://pauseforserenity.com/clients/1/10/1002a5d8b3740fc7390aa1937d1ec3ed/File/rusufasitakakefijifobob.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110c5bba81af---25555523868.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/941c09639d4ce5369909fab630f71247/kozige.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/49251248267.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/51300041735.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16102b001de26f---49577250141.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_off0000c762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 16392 bytes
SHA-256: 91b0afecea229aafe46a7712d5a8f7a02c1c05bcfd03946b534563dbd6f01d63
font_02_sfnt_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 11360 bytes
SHA-256: e9a237cd368f52991b8c7225ff03ead2684531e38c6f918c47022b1d801037fa

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