Malicious PDF — malware analysis report

Static analysis result for SHA-256 78585e9901dba9fa…

MALICIOUS

PDF

81.8 KB Created: 2021-07-04 08:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c2f6ad1c247dc8463fd9566e1ad59f0c SHA-1: 883ef7b9541bf43e080f1cdc51572ff70bfa7ead SHA-256: 78585e9901dba9fab7321212127486de74a7ff7b7e670a99a88bb22248002079
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be6fbd686ea---kovepukax.pdf In PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/55439501468.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/87283821147.pdfIn PDF document text
    • http://absigorta.come/file/52265431085.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/sajuvotupitazaf.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/zugupanimapuvofisos.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2el6dj1634nco7j82r5pt4c7q/20741602481.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/47353664654.pdfIn PDF document text
    • https://retta-bg.com/userfiles/bawuginixus.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/89639568019.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6bakubj8nkucek5tipvu063ud4/97204122403.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f2fa57f2---46732589133.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/dusulizofozisok.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8347d9d3c---67784866097.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/a2q768ksj7groj28cegr5d3c3s/56390981352.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fea0dc02c---27020322275.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/gazibidisifamotewoviwa.pdfIn PDF document text
    • https://industriameccanica.it/file/93017425938.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/83073663864.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/movubotopat.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078bdf17e047---69463156472.pdfIn PDF document text
    • https://noddy.nu/images/file/rozanupisixuwuwa.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/rlraen6sh1js4o2mq5itqdv1l2/28595624572.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abdce8aada4---99480144930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=assignment+class+8+english+answerPDF 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_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 17160 bytes
SHA-256: 7d3d1ec450300953195f087c7fdb63a7bf596286e9cf8f4e8271a22bd2d1499b
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001213e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213E 10832 bytes
SHA-256: ac4a232f478f837de05c029374cb1b6c8be8ac6f23ddfb6211e55ff508021666