Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2fe979b98653c7…

MALICIOUS

PDF

79.6 KB Created: 2021-09-07 17:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 471a002382d0f7b7ee8aad7df9797471 SHA-1: 12f9a9b2c0a491e928e61bc80c037fe78b469fe3 SHA-256: ce2fe979b98653c78447c75fb0aa0d19fda3ad53178a7ee663c090e5758201f6
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The structure suggests it's designed to exploit users by directing them to malicious content through a series of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://qatarsecurityservices.com/public_html/userfiles/file/96543778140.pdf In PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160edb9c0b3b13---kipomelekiwagivowozotajoz.pdfIn PDF document text
    • http://indecomavo.pl/inc/77976032582.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/5g91j8mra1ior4nbov1aakpf92/63043947893.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44cc9ece7---jegixefuza.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/xedugisulujotalitinawow.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4c5b8df2d---mumutepek.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/3332359685.pdfIn PDF document text
    • http://rayer.cn/d/files/81669245772.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/komulogasipit.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613000725f2d4---renofevoduvategoxedi.pdfIn PDF document text
    • http://hnspkjx.com/d/files/runogikosenijulonebego.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ad94a6f07d802e634c7af74d9bf477de/57500499232.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/nuwasufumag.pdfIn PDF document text
    • http://fitviewer.biz/files/file/70448066863.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/73475416655.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/70090956186.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/nojaxidexigenagek.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1b8856f6---19826234164.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/5212348076.pdfIn PDF document text
    • https://micsys.in/userfiles/file/fivezupubokoni.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160de227896799---68360993253.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/9859310320.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/tagozeluravamov.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/837b2696bce21388376039b337beba0a/96702085477.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfb33faf7---rulafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=action+words+worksheet+for+ukgPDF 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_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 17576 bytes
SHA-256: 3dc552ffd7631a218a561287baf3c8527cb96a4046167fcd8a14df8808619125
font_02_sfnt_off00011835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11835 10808 bytes
SHA-256: 524f9b0ee031da12513e065b01e51489a3381c3e41c31fcf69f686b10bfdb794