Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed0b4ae8bb46912…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 08:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2dcb65043c2a1b83733e07766b9b84f SHA-1: 5b25be3ecf605a34f8edde7ed1dfedbb840f9ddd SHA-256: 8ed0b4ae8bb46912b2f954a14a0dfa8fc8c91d19b63c35b1c41d02b7fc2db410
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pixomot.ru/uplcv?utm_term=cast+of+a+good+day+to+die+hard PDF link annotation
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/8a1u6les507ojhjh0gt3h4as16/gesanufezesurunukiniwizi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb6e53655c---wipoxusavaveg.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/99735719673.pdfIn PDF document text
    • https://alariel.be/userfiles/file/gofopokefimovuliwosiw.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/u0ic4c6jv2q0vfp5ihjl5g5tbj/60963963195.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5e1e215c0e9d482733f26d7849869b43/vutirelaj.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/50814688961.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/c023hq4eiphl2t6cccfo9djj0o/16022016691.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/10137687080.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3mnldgk9tcineqn45mago5j293/mijijuvepazaf.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/56vsn5uhm328f9iu40gqpf56ur/16331233622.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/72561343133.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f560b293e00af87263995a610942acf6/67270498591.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/lbuutjle1cujerg4i0de71htj3/87705228198.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c7b257a28---16014028133.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/rodogodafufoj.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/zumaxisifu.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/sosasotaku.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/pupavaxevomukorudi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2de9e2eb4e---64856375723.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af778f0d4b9---xosijemel.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/2eeb3342636d0927c495c86d15a19a49/40562534608.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_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 16792 bytes
SHA-256: c25d8202572ffd7fd4c14a3abac18ba8ca7092f4d4dcbc15d851154616b40927
font_02_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 10628 bytes
SHA-256: 5f91d426243d1269c93453b5f4d4580d72fa646cc100d03c007a3a4e7fe404c6

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