Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d8777e1ae99df1…

MALICIOUS

PDF

110.5 KB Created: 2021-06-21 05:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: de40087d290899d21eb50d041fb7236e SHA-1: 83343ea6ebfef6c172b99c2fb0645c96e4a3d867 SHA-256: e5d8777e1ae99df18bf4c7567d3dd6133dcf70e2d6ce14b6274707db8edb3158
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded document body text, though corrupted, contains a search term ('Beatles 1972 album') and application metadata, indicating a potential lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9563

Heuristics 5

  • 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
  • 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=beatles+1972+album PDF link annotation
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/s2gmi330idt54q3v3jprs65k49/zodalosutujufiwag.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/pixakofowonapem.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/5aea29c0331d725478e2fd45e0a958d8/55697220536.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846fa41e6b9---3912473060.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081542a28890---dilimusenanigofet.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a79abed69e5---zafedabexuzelogovixoxozeg.pdfIn PDF document text
    • http://evola.it/userfiles/files/7726679710.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c6dd1769a9ec46de4e8fdeed45915e43/tiwogijaruvivimozorewara.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/em77uqc7ltc9rp2h0l2ct458us/fetugo.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/lulot.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607505750869d---38395583617.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jojajalurefivufasatape.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/24743926459.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/jutima.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa322e8aa5---93398919811.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcb84b0be3---76932785415.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/9ggo3bc2mlevsjcq5qj6775svg/guzinefupediwoxug.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/41685674454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196AB 5344 bytes
SHA-256: 2163c6fb56ce85b08c92ae755059696bab77f6af6d1e296bebb08e4890f72ca2

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