Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6022393cf631e0…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 09:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a3a9b2698ae58f6d71ef26d23d733fe SHA-1: 154446169f07447bdbcc624aba6f2a1ea30a5cd7 SHA-256: ff6022393cf631e0a30e907e9a4a20ae333b8714bf5b5d66a4b3152be910b6d7
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded links, many pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content or downloads. The presence of a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=15+lakh+kadon+aauga+full+movie+download+filmywap PDF link annotation
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea25763e7154d646927aff20fad1ebd0/24521952339.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/natukuridogewurelevufazu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ae26e0d1c14ab84dbf3791b27b6bfc20/zupunobiwewovol.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/jazuwodesidexetajezaxe.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f243669a7b---70912180969.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091603355573499.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/93986245511.pdfIn PDF document text
    • http://fitviewer.com/files/file/voravodotewulexaguzimusu.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613149dc96f4e---55956120131.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/94620070769.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/78398199067.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/lomedozemubuliresifatol.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/lalutujivejo.pdfIn PDF document text
    • https://ka-base.no/images_students/files/pigib.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/tumuduguzadinesixu.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-01-21-50-34-gDGInt88.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/21788536484.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/samirukabo.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323d2a5461a---zupogosuzuloximino.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/pajufozejivitu.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141de269eceb---27158714998.pdfIn PDF document text
    • http://prestopc.it/upload/file/94009413971.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/pezutefidibevutinema.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109162033156855.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_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 11124 bytes
SHA-256: b0543c0184498bb1d3aea192a4cbd0062467fb4a5ff35ec217512670e9a18454
font_02_sfnt_off00010e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8F 19440 bytes
SHA-256: f8b32d19faa560e73feb50b20630804370af3b6d99b5d8f5940d0b9cdf27b3d3