Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e74cb4b8c72b9a…

MALICIOUS

PDF

84.7 KB Created: 2021-09-12 09:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e0613252fb9407376d58a60b2b433c93 SHA-1: 60ff54effb1d61a435f6c109280d21da62618bbf SHA-256: 48e74cb4b8c72b9ad9bce0f043c95a8ace5b001e5f5ea6df82bd6e2b82a15961
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external links, many hosted on disposable domains or compromised CMS uploads, suggesting it's a link farm designed to lead users to phishing sites or malware downloads. Although no scripts were explicitly extracted, the PDF structure and link farm nature strongly imply an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://goldmustang.com/files/files/8410588768.pdf In PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/rqv72l3vuo2omdle7mhdrot8ik/rowulotajipobap.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/78833865103.pdfIn PDF document text
    • https://davaocarrental.com/images/file/92614601568.pdfIn PDF document text
    • http://dgkno.cn/upload/rogukovabosokaw.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/77661642543.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/05d47816c6d34455550e08618b9314ba/xizimaz.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/gidumipunabejorizururoz.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/lafixaguxagojitos.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/15019221353.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/62675565443.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/78196658455.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/tibipemomasiruxexuwe.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/40854201404.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/r5835o54u6vsaha63kh724tv06/83564746006.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/xujizirizalemutib.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/37504061180.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/kixozafidakelipilex.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/55892735.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/ruletagov.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/3948995414.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/96281202652.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/kijurezasokelufukama.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/panixexe.pdfIn PDF document text
    • https://onlinendttraining.com/files/11318254343.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613304089976b---36852845134.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/jelozowafug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ielts+life+skills+b1+book+pdf+free+downloadPDF 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_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 17968 bytes
SHA-256: 7da5eb837e2aea00de216e31343e0594a7e3d341f2e0831389062da1576cc379
font_01_sfnt_off00011381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B98 10812 bytes
SHA-256: d3c84771e7035a30b1a09fa90b51c9d9a2e8ab9569b394f8c307a2a3e9233ffb

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