Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aca994593d4aac2…

MALICIOUS

PDF

86.3 KB Created: 2021-07-04 01:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 85828549792e49e24568b170f8c479ce SHA-1: a2e437e37169d160375ee1d0b6d874996af2f723 SHA-256: 2aca994593d4aac22a956d532d98a980ea088f19742e6fc4a3602dbe0aea3727
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns. No scripts were extracted, but the structure suggests it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=product+sales+dataset PDF link annotation
    • http://palyavalaszto.hu/teszt/upload/file/25766393788.pdfIn PDF document text
    • https://33mobility.net/uploads/files/10756068586.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/35cddb25f6272bfe0a81bf5a6480a308/difuneworavemopuw.pdfIn PDF document text
    • https://europartner2.pl/uploads/menubifipagalewuka.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6297552850.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b126e7b0aeb---77788051879.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af9b6495478---81915554372.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/87887066790.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc62ae9227---56024730077.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/nasirofagipop.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/sujaguxisozojiruvotud.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5ucg62bj267uftiakpuiu8gpt7/87400519676.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16072f2676583f---saxofiba.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5c18f98ec94f9d60e1dd6030b0c39588/nupuribol.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/jebigamugesopatozogog.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eecbdd67f3---jaluxunidozejivinudi.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021627115247035.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/lojabutifujivevet.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/pesoxu.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/vadurubipufim.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6d3b9e76201eca06d75bfc04e1edd68c/15181382675.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783e0735824---22214759335.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/sufikupasetumivusesum.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/31611514288.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_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 17580 bytes
SHA-256: bff987e6441779523c78d67b5a44b6deaee835c706e2201cb4c8e9405f272bdb
font_02_sfnt_off00013331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 10268 bytes
SHA-256: e8646dcaafc5fd761433616aff8c7a8192d91c663321fc6948a65bdf4473594d

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