Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6ab8aac91042b9…

MALICIOUS

PDF

83.8 KB Created: 2021-09-06 21:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0dd5f9348e8b943811f7c6254b29f5bc SHA-1: 2e0ed9d9e8330cf2c7e6b80259d225f15f784686 SHA-256: cf6ab8aac91042b9355445a12f7157cc8488da83420d69c023fc111489e929b3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external URIs that point to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=nissan+primastar+2007+manual PDF link annotation
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aee922c1c---mowuxivakako.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/a1d25daa98be21cc7fdd33ed450fb7ca/20242545489.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/derokexazoxevusuxuvobigib.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/61810711347.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/mifutenalases.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/58nlegtbsv79bm5uupn3kuf7he/dapazenogugirotepolofivux.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/besatoxosunawemubul.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/17015277153.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/medexur.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a950ba8a851---82395305443.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/16849360277.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/65143369098.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/20626936135.pdfIn PDF document text
    • http://cga82.com/admin/File/45622456497.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kj8kv5m3dprvup0c8q0aggs5c6/fipogapavolilimabafegopos.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/toxelovununaziv.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/39878630159.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/dineset.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/197te2inob47uopu7u370rjku0/kewagosesoguvunuzalomugif.pdfIn PDF document text
    • http://lagrupacio.cat/file/megurug.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611bcbb7995fa---jonokabupalaketo.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/82136640973.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/ad34591dcbef010e935e0e10e60bcfe5/49578409361.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_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 10532 bytes
SHA-256: 41ecfada0f9052bfc85639aea0c8448b814bae124b953b4b53e8381955e1b26f
font_01_sfnt_off0000fb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 18112 bytes
SHA-256: 08bb68d56a32e58758e4894886a7589f3fb393d1bd8682f839da62f360957534
font_02_sfnt_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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