Malicious PDF — malware analysis report

Static analysis result for SHA-256 60daf57ad4cc7cf0…

MALICIOUS

PDF

73.0 KB Created: 2021-08-06 10:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 80ad68989539b5e2ebe949b74b5baaa7 SHA-1: 74da83abb851d8874c99fe471ff7d90da97517a4 SHA-256: 60daf57ad4cc7cf03ffccf63a237b5c95c163bcd46f3c756b4b9c7484723d70c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external links, many hosted on potentially compromised sites, suggests the document is designed to redirect users to malicious or phishing content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075900d2b080---87469952296.pdf In PDF document text
    • http://tfforming.ru/d/files/rigopotoniliwa.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22def5e0a8---67154044805.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/zagemax.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/gokidoximiporobabifa.pdfIn PDF document text
    • https://bloomeng.com/uploads/79862210442.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/bf4273d681ada03e2443755bc7ecb292/95153074645.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/rujojijuwoxotoxi.pdfIn PDF document text
    • https://iwistw.com/upload/files/godivepipobevenasuruwila.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/wopasowakagubefosil.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/pikojujuz.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7e595b99c---bibujoxaxenogibujexoja.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce623b1f06---59384415868.pdfIn PDF document text
    • https://hirurgija.me//files/43060368674.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ceaca58ddb4---dopojuvitojukerib.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/f72ngk25c7g1im5lalcg125j8a/gugotogosuwezixabesa.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/57638363443.pdfIn PDF document text
    • http://mopron.ru/upload/files/bomapo.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/57237888179.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/9df43f1fd891aa486df9804ad26c9176/46516805546.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/zesupezunepapefowowude.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/86655363137.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/653b67cb87d0bbca94764713376acc24/29688572591.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/8625887707.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160805805bf4be---49873736362.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/tujelopozelojasinegitek.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/dikifuvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=microsoft+surface+pro+4+charger+price+in+indiaPDF link annotation
    • 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_off0000bdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD9 11024 bytes
SHA-256: a6ae7560b86611abed9b0ef1bdbee5ab6ccb3d57ea8178af2e8a060b35cba66f
font_01_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 14380 bytes
SHA-256: d671a07b8f2dbeef0430c6cea47a472ef6b9f677d4681d629d4cf2289ec6c4a3
font_02_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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