Malicious PDF — malware analysis report

Static analysis result for SHA-256 068c965bda1325af…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 20:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52fc5611dfdda943e6e350adf2d4d5d8 SHA-1: 26185e545af21c4be21bcd5cd97873701f7b6bc2 SHA-256: 068c965bda1325af9733c7bc30f688c76ede5e0cd0d099d2b7a30e4ca071bdac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of a link farm and compromised CMS uploads suggests the PDF's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=thop+tv+guide+2020+live+download PDF link annotation
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136745f07922---sereni.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/ponaxax.pdfIn PDF document text
    • https://equinox-e.com/upload/files/bokonoj.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/1078709153.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/betojebitudiladekanen.pdfIn PDF document text
    • http://castel.lu/userfiles/files/18302947928.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/83560181046.pdfIn PDF document text
    • http://home-plast.ru/foto/files/dawejukuwenamopatelus.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/0c3e6a087494125e69343d10e1ce8b72/dezasu.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/ganotalawipojexud.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161391e1adb949---12745226738.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/lolefiwin.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/movenojum.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/41002817976.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/pubezo.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/fopimonerepu.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/48495957757.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139dc52b7dc1---17823910179.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/85065966525.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/27033956863.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/lololubosofemeb.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/58815102790.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/41794144336.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/puvusane.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/53742784115.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/38547597124.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_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 10860 bytes
SHA-256: 83c23306c8092a2d9e8b97cf36ebe353c07084391c4b5e2cdc3aea88b8f7364d
font_02_sfnt_off000107ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EF 18068 bytes
SHA-256: db03168767af176df3af8f23adf43e6c13127ed6e565e33778d2cb92c74995bb

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