Malicious PDF — malware analysis report

Static analysis result for SHA-256 335fcc26dec9aa9f…

MALICIOUS

PDF

60.1 KB Created: 2021-09-02 21:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a35a4919bc1ea2e9a45ea9f3cbfc782 SHA-1: 49dd75554f1ed65ac7637d58b085074fd42f19d8 SHA-256: 335fcc26dec9aa9fd6a4d84dc527ba784e1256f4d8d58407ed40c9a28462190f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a lure for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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://allytemp.ru/uplcv?utm_term=bibliography+latex+manual PDF link annotation
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/fubadimezijik.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/4458269177.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1866e28b8---vafux.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6a6f6615316d5935262db97b65b2a7fa/getulorikudagefenezajep.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/kogoxunimurivitivore.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098382c5f527---rirubelabebewetorapobuvet.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/sapofesepogetabekipam.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ibo28l10pm9ek3d8q64l5e48gc/losulabi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/283hr8tv84hq6f23jfq9aqabd3/31854894210.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/68904693436.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-10/20210510042336477131.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec506e3b70e---simomodisiboragiv.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/70219cfaa85091aa5eb0f16dfebbab7d/kumusoxeda.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/42909434588.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/69578612758.pdfIn PDF document text
    • https://foulardfotografando.it/file/pokikeriponazadi.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68273641981.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/mulobujopulegulas.pdfIn PDF document text
    • http://orenprom.com/img/account/file/jonefu.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/80215903640.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439c9dbd33---kovemu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/9r05j92kevj86nvtfp99krm5v9/5087821805.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/of4s6c54lp2p7dn2vmcp6snuo2/liwokavugozubonunoxezaf.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/800bc14cdf6f593d4dc3470bf67adf03/18676373949.pdfIn PDF document text

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