Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e59ab16ea52cff3…

MALICIOUS

PDF

78.3 KB Created: 2021-09-05 09:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 847f949c2bbf22e38b7952bc4d054d6f SHA-1: 3e1ffc56553b4ba01c9b1f57ffa9cc6704edf9d3 SHA-256: 0e59ab16ea52cff342e973950da0b0abe66299b9b22fdba6c65b08e3fb96d19f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, which act as a link farm. These links likely serve to obscure the ultimate destination and distribute malware, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ht04ccl9surjb7go4nrr180bd2/47310165157.pdf In PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b727c54f---59572934960.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f532782c4---45639461577.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/mojobosavexinutuk.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/2653064203.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/46917020352.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/0ge5mv3nkb4hf5fot0oebgqah8/dujimopakezowagokavebezok.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/wenowidewobetububevamexu.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/wodar.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/a28b2fe678420f308032c04cfd9e17b1/fideworina.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1610edca490e66---pedezelemo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b789366043b---66629983182.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610055b8eebc7---nutelasudesufu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db13c8008fe---kusuluma.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607118c3d4337---55071174941.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/70c5a7d686f9fab980615d6b0e40a426/64328178699.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/32539296543.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bc9cannlgkalsfmaejlvf7e2h2/kefof.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/valukajexapexewusaveda.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/77209535965.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/f559ca5d9b0d02d508b767bd2f67c422/duxomomumajikamobipame.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/povotomawirepulog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=x-intercept+and+y-intercept+worksheet+pdfPDF 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_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 11004 bytes
SHA-256: d715a980ad4cf49cd08e941cdb2d5efa4cd7d445c381f40695f19889e7ee69b2
font_01_sfnt_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 17560 bytes
SHA-256: 6719bdf4526765e65922413fea8183ccc5823a9a1c5477420ae324db36623fb8

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