Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fd5935b8f3c6c5…

MALICIOUS

PDF

244.7 KB Created: 2021-08-13 00:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7199f59e9db9e723553343f6e1478a56 SHA-1: 21201398ad536bdc4dba9d526119e022e5015b57 SHA-256: 94fd5935b8f3c6c5849d051a0fc6276088e22daa8aaec5872eb96c651e89b4f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves directing users to download further malicious content from compromised web infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

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.
  • 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 http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608130ab9da0d---55817001188.pdf In PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/680f28ed2b5d0e4b0bb0cdb0d4d58f52/wovuseliviforekebaf.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/23419534754.pdfIn PDF document text
    • http://bscartridge.com/pic/93819955011.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827b8f7e0d3---91793731980.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcbd18440a---sawubegezowi.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/38312322319.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/34901863082.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e17c408a5---lurepotolilalosib.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/jalcg50vp2f0rflr484oun2sh1/nebupawofurow.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/sadadudutejepaniva.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bn95cni3crdj6qc3n7hh9cqddp/wodebabunini.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd4087d6dd---gabolodezebenifofa.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/vojuputulorotitibuvemanis.pdfIn PDF document text
    • https://flyags.com/editorResources/file///11037876708.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/2lq2s98djlolakqhb4gfs6a6mh/59051399293.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7f71cf055---14275393998.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/kqprnmjm8hhe8b62u7jqm20v5s/59710714573.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28390e750f---xajukapobuj.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1bced097---36003945523.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/tozokixozufajuna.pdfIn PDF document text
    • http://newo.ru/files/files/zugapotaxij.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7f08f21f5---faninisuloritalevabapeb.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/70139432443.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/62163601248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=forskel+mellem+tdi+og+cr40PDF 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_off00035e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003765a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3765A 20420 bytes
SHA-256: 7c568690ab7153b313f522cbbb3d1999d1254f6b355c7a2367c6ee616ff88130
font_02_sfnt_off0003aa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AA89 10716 bytes
SHA-256: 4cdbb0602f0bd74074bbf4507ec7a351d2e804a0660c80b08f33219234916a0b

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