Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c9c938092170c2…

MALICIOUS

PDF

87.2 KB Created: 2021-09-01 19:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7c85448e870e05ed580f49ba7f86fbe7 SHA-1: ffb15fb34057aa4d65a1914d8ede89e7106eb7c5 SHA-256: 89c9c938092170c295dc6b25f5bd24f626491b8aa8bd78bfa5f59da0b65a44ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The presence of multiple external URIs and the nature of the hosting suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=introduction+to+machine+learning+with+python+pdf+o+reilly PDF link annotation
    • http://lica-mpt.it/userfiles/files/pomugexeduk.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b9ad2ef2c---75987080102.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/42434992902.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210716133822359.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210805023746.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/15194417057.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160872928b3195---16592824544.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5d5c017ce---55445908882.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/92281234894.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/d452aa41b5db485c009e6e88783a4583/81417696139.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/70528edbf1b44245b54c0f229deca902/kulaneranawuvepen.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/befugusevuba.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160775e9d692ab---vivoxudeduxagojirovatok.pdfIn PDF document text
    • https://efnnma.org/files/file/rosavudapexe.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612138637eceb---xakapofefibesovosotugofun.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6936b7b416---55935268141.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/l7kf9jb26dj9uj7fqlvco3njb1/9614344971.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/damolirovekukigidaj.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pezuxuviv.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/95051001001.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160783f07d7f74---govibiworabox.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/cca4bcc730d0d8478be4cbc644862bd8/tojimevagazupot.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe0d136df63---82165948101.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/givitigiruvul.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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 17664 bytes
SHA-256: f5ec023a8e526b643e165664a5ed5d59f370682c72bd010149383904f0888690
font_02_sfnt_off00013440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13440 11148 bytes
SHA-256: c7b3b67af13d9c67be86a42f2235fe2f2e32997d7ff87d97bd4ae05d64112942

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