Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42d9a9022b93c0e…

MALICIOUS

PDF

85.8 KB Created: 2021-09-06 05:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7610b097c84bbd0a7008230b9605628f SHA-1: af0c41c7fd07f7552bf7475a646dc06b9c279c9e SHA-256: e42d9a9022b93c0e78e26258b7e27f5ea3014d488fe03cc1e7fb5e315c259cae
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites using formcraft plugins for file uploads. This suggests a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607713ec8ca42---ruvir.pdf In PDF document text
    • http://myjobcareer.net/userfiles/file/2021052108175473499.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7a4db9d42e53197fd28ce96cf8136419/gotibozogumowamimaruwukex.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/10034135852.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9340ca5d7d---67099623046.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c4f509e2d---35959061978.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/55584908415.pdfIn PDF document text
    • http://axwelindia.com/uploads/47223865396.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2094178d8---34792162174.pdfIn PDF document text
    • http://bakoca.hu/files/file/kirugalegumewatulolidit.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/34790bd54f690eafbfaddb505d90431f/29521316958.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/91486423585.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/regugu.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/tunivimaf.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/95913908208.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/mesojod.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210626145648_903173888.pdfIn PDF document text
    • https://questyme.com/userfiles/file/repidejufivoviwa.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/14896396849.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/tavewuvanijoraxidile.pdfIn PDF document text
    • http://standardamulet.com/files/files/riluforibigujubenodino.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/bopisamiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=convert+pdf+to+jpg+android+appPDF 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_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 10688 bytes
SHA-256: 6e865d2fb18caa6fa93dee9e5bca547159eb96b0da9b1b1a514021f62eb265fc
font_01_sfnt_off000101bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 18640 bytes
SHA-256: f3166a77c5ff4d3e30df7e48e5ba7dcb831f763ad8079445115dc70f32c3ebb2
font_02_sfnt_off0001318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1