Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d50e7948463a43…

MALICIOUS

PDF

95.9 KB Created: 2021-08-06 16:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68bec7a409e69db7b8e4c15ee177fd1f SHA-1: 01c4e5f84457a17358139254df84f2a4142589b2 SHA-256: 84d50e7948463a43c6e4fc905663c0f39d97b79f8d8d8a5642381f322717b0ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm designed to obscure the ultimate destination. The ML classifier strongly indicates maliciousness, and the presence of link farms suggests an attempt to drive traffic to potentially malicious sites or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 5

  • 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://reazfarah.com/ckfinder/userfiles/files/sexejimawugoduxole.pdf In PDF document text
    • https://bwawarszawa.pl/upload/file/68856631065.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4161e0877---83462542713.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/jilolisofokavu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867f5dc4017---jixux.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609950e8bd57c---volafilajadufozuvulak.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/lsmn2sngib0tqhnonfvpomhm1f/31776144052.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/29941469096.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/nuvijunofukijujekubuxad.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/51270493216.pdfIn PDF document text
    • http://greenld.com/userfiles/42739164797.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607befb91e60d---1941484444.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/g7c8rc3ubvrtfi6a7pg5vm0eac/wuregim.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161003c6c8dc1f---vuremori.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a3fcf06e5---27000348578.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/17250642536.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/2ce80910e767509ee1eed31046d05580/rusafisikadudezavekogejux.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/886a0517a43c6cc16fbfe0357f846906/mitogafuvebido.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/af3aa72119a34aec9d7b0a7864506a04/33906366449.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/pimogi.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/nemofozoramukib.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/41742223679.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac259b521e---36024696360.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f8845dd5---59240349153.pdfIn PDF document text
    • http://markone-tools.com/upload/files/nizefidenuwopijubatel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=assistir+filme+online+a+mumia+2017+completo+dubladoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001109c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109C 19588 bytes
SHA-256: e5e40e8f97cf582a5619bb0f0e32820a04b8209b81f46c2dc31e3d9619936db7
font_02_sfnt_off000140ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EF 11344 bytes
SHA-256: 8665db4691471ba4dfc41af7bf8adb283efbfbc6ed4af8cf79f1f683e3c3cf99
font_03_sfnt_off00015b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B82 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd

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