Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe07a5955317e7d…

MALICIOUS

PDF

73.7 KB Created: 2021-08-27 23:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9cd4d308d2da4ac8f1cbe2a61190c0b7 SHA-1: 1aa72f82a8b36ed0fd247a50551fbeda40c10350 SHA-256: afe07a5955317e7da7baf9e53c95e2b994dfd246b09abdc411332f8507c125bd
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, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage, suggesting it's used for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using disposable hosting for link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105190419185875.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c61f35a16d---46800428087.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/d1996b307c5b00e531dcdee9da37613f/13102349061.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/64457125601.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5cd3c532a---niwamikowokubalivokam.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tawuvu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/gopanexaruruk.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/bejonak.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/zidobujavi.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a98944875---wasojuduzuzutubel.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/12069277073.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/dujonugakafelenok.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5aeb62e95---95666590352.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/67f641d2d224491f12dd6264081b89a7/lewilujiwizomiwiwagodi.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/96492034205.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/246fc3e96b6607713becfcbe9b213c60/41463655636.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/tewejedudarek.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/majumuraxeru.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/3122635191.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/zivutivomemofemun.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160880443ec659---87882146999.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e629f03967---20927157569.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd53334628c---41853580201.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/28149115543.pdfIn PDF document text
    • http://martonelektro.hu/files/file/fidugos.pdfIn PDF document text
    • http://aa-nusd.jp/zoraxakunasalemanedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lord+buddha+hd+images+3dPDF 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_off0000ba3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD253 10816 bytes
SHA-256: 6351affb2d6f2a7f0f6f4b484b55cd96e734d16a8aca2e0f527fc0eab14c82f0
font_02_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 17456 bytes
SHA-256: 2c27b4b16e5dd88aa4ebd4d714fca562da2268db17d22c770de82b19c2051030

Open this report in the interactive analyzer, or submit your own file for analysis.