Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3d8a3047103d20…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 09:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 08ea90468bd52e13057ee92cc6596326 SHA-1: 0f82ea20ad9f2a58fe24adeb06409feadbac92c3 SHA-256: 6b3d8a3047103d20252e2d8ba3fda3cd820a0a77736e16eecf73e58034521b28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=watch+stand+up+guys+online+free PDF link annotation
    • http://soyaksiesta3.com/userfiles/file/45549534691.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/6415607ffd3ca806bebaad59bd5e6373/67828315309.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613db7cd97caa---63863553957.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/16516543584.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/42208099662.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/rufefagitetefipoz.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/zavagobidatagomatodefojof.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/siwudelalu.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/49876171823.pdfIn PDF document text
    • http://contua.org/userfiles/file/76010474835.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/nitukog.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/22364151017.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/34393072918.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/maresumebodedavi.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/tadaga.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/51572682122.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/64cc9c47e1edca3585743a97504c7ed5/fapovujetaz.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/d910do4sd4n47vko19ecledir1/83761782502.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109071706584964.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210902071805.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/wuroxera.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/gezejutofi.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109080022097115.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/nixeriz.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/megineretebisabevipiduv.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_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 11108 bytes
SHA-256: c1171e588085311a294123b6d04c2d935bc43ced907c415ef935cb5a2bef5992
font_01_sfnt_off0000fe3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 17976 bytes
SHA-256: 27d7fa35171c6821c4769a13f8868e176556afae0a6a0acd34cd8fad2874f052
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.