Malicious PDF — malware analysis report

Static analysis result for SHA-256 569da0de2e225af7…

MALICIOUS

PDF

63.5 KB Created: 2021-06-24 03:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 728aab695cd38abbca542b5645aa6f3b SHA-1: 471890fb1102b168a8fdfcb40ba8016c2306ab27 SHA-256: 569da0de2e225af78dff34221c1b331db61ef9873fbd6482843c74d925cd3a22
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are sufficient to infer a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3b921b05---452377973.pdf In PDF document text
    • http://gocep.org/data/userfiles/files/tisuvazupizodakifumibowon.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/37c969861e210a229bd57a6e48ed6b17/90628911579.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/622af99bf39d9aacb83bb42f98afc36e/91914178355.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/50419291183.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/rifetononimenizexus.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/nabubesezufa.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607049f0a9816---nemobex.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/2bac7932f7b08aca31b7daad120b5ea5/jazazakejinotul.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/82775781647.pdfIn PDF document text
    • http://kag.fr/userfiles/file/66716033775.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/rulafi.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/gapafurizilebijabokobaku.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/jumabugapudiru.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/77lip1utflh2ttad5g7tj2eon3/97105505569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=o+meri+mummy+nu+pasand+nahi+hai+tuPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB48 5296 bytes
SHA-256: 79b203e5d71c276a421199119496d2384af7fb7a00ba83978513e88b4a248a61
font_01_sfnt_off0000cd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1F 10360 bytes
SHA-256: 39ab9426d2fa87561adf1d86ed03275ade6c70c5704dc70e1ec31528b1f5e264

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