Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f41d074ffae7f71…

MALICIOUS

PDF

76.3 KB Created: 2021-07-05 14:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 298bafd17db82d878f74cc20115fb60e SHA-1: 5b812070dc5b352af4e9143f10e55730ee69541c SHA-256: 2f41d074ffae7f7199dbc6a47c406ac23cdbc17071a33f29f7161a5f0d4b68ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://irlanc.ru/uplcv?utm_term=igcse+math+core+and+extended PDF link annotation
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087368dd879a---popogejanelitiwe.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9216f61cde---66568514697.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcffb85655e---tevabepigofuvatili.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/47533507164.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/21178728585.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a128c98cfb1---12386382700.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/10170fa177d7fb5e27e1eb88b3ef8344/pakifuwom.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a508bb2a613---37985148869.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0bceda64c68ebc7947d5511e77feca99/35543825249.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac730d07573.pdfIn PDF document text
    • https://people11people.gr/uploads/File/gupefurusuze.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/ldhr5oohsia5ahn88qgkjoi7r4/rizijokebi.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/47901279665.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/tibivu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69d5c9287---sajupijelejol.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/kevilafakisidudoda.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/f1a4hi4g2u77836nrccqe35gof/12809620592.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/38334aef0119adbdf08e059f6e583f1d/xetad.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/redenawopedasezatafepo.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/8rju7v7ik99ro23os8t43sie2h/dozewukutojegikadefixan.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078872faa581---11889669413.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/vozogafaxupofafumixukemi.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/bemamudorunevowunira.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_off0000c06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 22608 bytes
SHA-256: 598f94dcf63aecfd30c39ed238b6aa752508cb3f60f6bf936e7c9aea3887b81c
font_02_sfnt_off00010bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 10732 bytes
SHA-256: fd08ca4c368f5ce04fb33490778cd71c088ab28502511180c3c6b12ea39d3053

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