Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d75b71b527a3b7…

MALICIOUS

PDF

82.7 KB Created: 2021-09-11 06:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7273c612ba8ee3700ab71716afd977a SHA-1: 150904dd24daf087ea61443ea2117641bd9e47c7 SHA-256: d0d75b71b527a3b7d033f8b797de8650d9d0e6357b3c906465dfa61eb74ade71
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be disposable hosting or compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to redirect users. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URLs point to a common PDF-based redirection or phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=hd+live+football+apk PDF link annotation
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139357c179e9---92232840919.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/juluvedorovu.pdfIn PDF document text
    • http://webs123.com/userfiles/file/73074071827.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/lupukubezevusubatuvaxuzi.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/93185891976.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/46877083899.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/mitibagomusubabulujologo.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/60077545400.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/64492733005.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/43971034133.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4abf316d6---40384359898.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/73482167853.pdfIn PDF document text
    • http://gardatrans.com/content/Files/86631563256.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021090915291573499.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c43ebae01---junikenelupuverelub.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/zapiduragap.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/79761434102.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16137236a396bc---rotiwilixeputabag.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/fepufunumaxomaposire.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/datejadofobobir.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/mogij.pdfIn PDF document text
    • https://bnovum.hu/downloads/mupekajatuvopatuvivutuf.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/78787464857.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312a18dad2c---gupub.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/6965469155.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/35722962623.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_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 17692 bytes
SHA-256: 1e4792761ba7c4f4985ff95b36507620264e7e7e78898a2cc3bd8b23447c2514
font_01_sfnt_off00010d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D61 10408 bytes
SHA-256: c2de373e277c0cc71808ef1e5b4508983f806137d9d42b94fafbb09af6962987
font_02_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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