Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb32e5b206fb031…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0764163dcc80f6e21d3c5120a298565b SHA-1: b52e9d812e31ce77cc375e53e07e0dc41ab157bf SHA-256: efb32e5b206fb0311642b5fcddb3ae9a0cc1eabe982d243d15a8ff6dd5b37a96
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file likely serves as a lure to distribute phishing content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=intervals+music+theory+worksheet PDF link annotation
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/236eecee0526b1f94ce25f3cfba5dc24/muwitebubaxux.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7457b59c---fimenuwez.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/nomavagomileparitil.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/59862483135.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/vavimutikumumotadu.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb06a40a012---vonavofekufis.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/88oatubgr2h5c0r19adr15d0l5/wepepilefesisuv.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fa2b2173e802e29a33034c27f31dc8b4/66788673509.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6ad8a37ae9d426ffc5c1b71eb94fe78b/51491565283.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/ragexenupusizuseteratesem.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de6765f17a---25059426558.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/galow.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b55067c488---81074852026.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/36155925988.pdfIn PDF document text
    • http://koutingchina.com/upload/files/15672157896.pdfIn PDF document text
    • https://landbar.com/upload/files/6576275997.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/vedufijatajeraxed.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/46277616682.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210813180315.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/dakukokimugol.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/19728548179.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/12941516177.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/wajekukubaduge.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1054f893a9---5578301753.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e48727887a938722973b2a52049fe4ed/90454126178.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://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_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 19112 bytes
SHA-256: 9d22ca8f7d318a45f822b0fece551b33daf973a3ed4924d65c49ad79fdd252db
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10904 bytes
SHA-256: a92c1711aaa117474613a284f730bcaefe79739b17403178251c09df11f7e0d7
font_02_sfnt_off000127ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.