Malicious PDF — malware analysis report

Static analysis result for SHA-256 965fe45fc87ae6d0…

MALICIOUS

PDF

90.2 KB Created: 2021-08-01 07:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6fec84761ec801647f6a4fb99fc40d6 SHA-1: 6efb082793965765302a580792b5663728b7e175 SHA-256: 965fe45fc87ae6d0becc3c14abbc35f4563b636ef1bd626ca898f8e4fc105418
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=man+on+fire+full+movie+download+in+hindi+480p PDF link annotation
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430083835797264.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f808709d2---lipaxulororive.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/enr4ivs7hr2igv906k9uqa8020/62144483466.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0f16085f---gogiwupikazituwikuzuxen.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/20512621567.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/73406442036.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082809159ab5---repanukowade.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/fijagawojowun.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021060516120890.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/24752492511.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cc9b8b6734611597d656afd450756bf4/68493938788.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072a200a05a7---84968292944.pdfIn PDF document text
    • https://tsegypt.com/file/joxakepesuwupexidufarepe.pdfIn PDF document text
    • http://congtyvima.com/images/Download/73510830401.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/goxigotegiveraxos.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a597bf716---23433729964.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/nesisigave.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/8919124223.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/79ffa44adacbe8e6bddecf54124cd629/13678672635.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/88024129737.pdfIn PDF document text
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/kilixitagobewig.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/lapegopejijefes.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ece1b3453---zefikevexanuvibopedoma.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://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_off0000fca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 11148 bytes
SHA-256: 3710bd47101c85425824f57db714905e3fbf71da45448ac1c3d45d5a1ac36790
font_01_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 17292 bytes
SHA-256: c2f6dd97d78b6b484333d7f709a54fc76a448db03d1f4cd44a8195ff1f659fc5
font_02_sfnt_off000143b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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