Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0ffaba1ccc5cc8…

MALICIOUS

PDF

86.2 KB Created: 2021-07-14 10:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72d0c84bbb44efeadae209f428de593e SHA-1: b375fc877aed48d69687d4c88619a15ce1cb077d SHA-256: 8c0ffaba1ccc5cc88b3756a1e5ee7019a9d37cf91845f9f3025f95cf416aff51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and compromised CMS upload links indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=track+1+and+2+generator PDF link annotation
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609df1b49c6da---49883446729.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/tofefirunexel.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dabd8ca0b4581c96220a12f6f19e7446/zomojogutarogonu.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/783195400109aeb6e7691f8a9e604624/20674029442.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/63e4cc84b5774730e3498d09962a7977/78957059955.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085275011482---dobixotajenetufakubijan.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160728f0b4e699---polorujugupaxitewug.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/24673286036.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/80423000006.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/8cb62a893cc5ebf734d74b6d615e995a/xoluxefitolewekezu.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/fuxikemelozogenigade.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/31746871424.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/23592769915.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5cd2681b3eca62a77654e393239b8cee/50237405291.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160925f5a00270---bugemubazemiwibuwonefos.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825df52359f---jiwitib.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/gatidewotix.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac40ec3d0---45140444403.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607384aaf357d---bizidaxazedowixozifalugaw.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8ef31fae2950f27ecc415e9117a56a8b/53725529750.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/vakikalakezibifepog.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c916d10599b78a040f55b3f6e2e9c18/fibulij.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/cm4hr7u6a3909042bts9hamfj5/96065360256.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/turot.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/xokotavoxotusevapuwi.pdfIn PDF document text
    • http://burnettefamilyreunion2021.com/clients/867108/File/jijebadoremelom.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_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 10464 bytes
SHA-256: 584e8ec9decbe1eb3820892524836b7abd709b98b8921cef9cbc5250582c1898
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 17016 bytes
SHA-256: 36650e591d284ce600c95ec5ec1d19c0c53458ba0e7875e198463aad1094b396