Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae02de6d6ffeeff…

MALICIOUS

PDF

87.6 KB Created: 2021-09-08 09:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 336ec2dded1751f840b37ca5f7c5a655 SHA-1: 5585ab026c43b50a18c2ee7b116f48195f1f677d SHA-256: 0ae02de6d6ffeeff418348d144eb9362a8867dadae291f41a3b928ca677d05b6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://wastran.ru/uplcv?utm_term=2013+scion+tc+6+speed+manual+transmission+for+sale PDF link annotation
    • https://ms02bet.net/contents//files/dilurewilukafad.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c55fc8814a---kowiboruv.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/56981926006.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/68ab552425e81b5faad8ef009cd422ae/23632011401.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/wenixali.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/43543266135.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b04329a2---92090266218.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/butegasoji.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/tamelar.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/svd056hnkdrdv4cps484a9hc64/94468449383.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/2ldoh7aepgv9lk3rvd6qifcbi1/gapuzujenidefafuzotutumag.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/44986036652.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/videxotojovagenoruxel.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/tujamaw.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/22845539551.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/1284937633.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/m2069h1jl33ue1j2ke03uknos7/76234479940.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/negusolijoja.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/27499528460.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/380c75ca55b58cc4e53f142d5c89a4aa/pisubijojomav.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/zosakitozamerefiwagar.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/25535432005.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3efff254e---85010274685.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/gisoz.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/67979876998.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 11420 bytes
SHA-256: ecbfb4b893574c10b76600503646dd2c71260fb337daedc427fc13ee75b36806
font_01_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 17836 bytes
SHA-256: 501227cb8bb86bab9cef06842c3c0b2fbd9fec2915007c692006e4de9e07112d
font_02_sfnt_off00013853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1