Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba6d7eb2d46c432…

MALICIOUS

PDF

78.6 KB Created: 2021-07-30 23:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ee8d35a4abd78eada994cc044e161f8b SHA-1: acf6a1f5156c9a215075dd90bdb33e5ad6d96ff6 SHA-256: 2ba6d7eb2d46c432bcf8d3005fe79dee1bed9ecb89bb16330c20af7d6380e469
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the presence of numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body was unreadable, but the heuristics strongly suggest a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=how+to+split+pdf+into+single+pages+adobe+reader PDF link annotation
    • http://laduses.nl/image/file/kabadoseduvad.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/24518514372.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607370e63f128---silevamuwopozevipaxases.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/87687447902.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f1abdc5e4eb1317e134a10654dad4b53/44872339419.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/14931745933.pdfIn PDF document text
    • http://irths.com/upload_files/files/78502039446.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/gs5kh4prrj1ulom6iesn7ut692/82409006672.pdfIn PDF document text
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/tobagomokedufopiratavum.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/koseduxukelijugamapunele.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/tedepajokovuv.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/ruporovobedematozuk.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839b944ae36---gozuvozafiwutusiz.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/21860709081.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6eb3c56d---fijomudutibipu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/xobubivoxetadupugirigogib.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/majuxudowodotuv.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/titinabopebemone.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f359ac398e8---sobugugerefudosidukivo.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f294b7c2b9---jufuxebomomodigopuraziwix.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/bojofiw.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b6f5a279ec50743b0e85909c4b26f4b/vefolujiwinalixukonowute.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105100334.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/xemuwofu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/51624567909.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/levevoloxesinomapesur.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_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 10892 bytes
SHA-256: 8a389c4608d898cc0589434653b1acbcde28d0d7943e92e6a89f1781e8e68bef
font_01_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 16400 bytes
SHA-256: f152c505cb61d9212f219e139e6c601ecbeeffb4dc72dc3e22556f971fb05485
font_02_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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