Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee94bfd36719ff99…

MALICIOUS

PDF

107.9 KB Created: 2021-07-24 09:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b9a85e73630406c4d1c010bf83bc483 SHA-1: da8ffc7c8b5a0eb55789dbd7faa55a4bfe49afb9 SHA-256: ee94bfd36719ff995b942872014653dd5d4ce0ec6083deb96683007c0515c0c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c67bb439b48---25611083490.pdf In PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2979fd04d1fe51db771035990868a0b8/batewe.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/03407f17355a76e5b246ce196865483a/midukadenunu.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/75095194166.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acce7069e88---99029080887.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3e693360dc7797d20e41c2e4e60803c7/tudalebaxidadipi.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/tivafifevenaru.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210506081225.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/92678587309.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nv7qle6svonc6j1iqfi56qedl4/mujalijuzegugadakine.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/tvujfb0ij8vsrrn2nqghvjt0tf/pevoranojiwa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16092a98011062---87368646049.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/64281673882.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942794a6ed5---numerepesikuxi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fa968e41f---vukilebasixito.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0l4cqaeq2nsbcouev7c57u0ad7/nefupizal.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ekjm8qvcuabralbi49slrhmp74/xixadezazigurovu.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/bbb66607102e24be38df3f5e2d246697/58920946192.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/fokunafifubazisepekujuxap.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/nuzovuzutazemudej.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/51863448074.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/50655244628.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=gospel+hymns+guitar+chordsPDF 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_off00014153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14153 11216 bytes
SHA-256: 3951e1260c3fa0c91f9d72fd35db1807f89ce4d52ba04f2fdeab1e81371b02c8
font_01_sfnt_off00015b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17358 17456 bytes
SHA-256: 0aa38b761e1e4f21ca2f73aae89623af3a7a01b31d8161ea95e84212c71e93b9

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