Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabca9af15057a4c…

MALICIOUS

PDF

87.7 KB Created: 2021-08-05 20:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0fc75d91ff0b6eda43cba13aada38fb9 SHA-1: a840588f29fd09674c0335566351a65a3da869ab SHA-256: eabca9af15057a4cf7262a317b838c6a9c8ad4140faaf341b15e24e740ea38bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves directing users to external URLs, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://cructi.ru/uplcv?utm_term=download+yoruba+to+english+translation+dictionary PDF link annotation
    • https://skinrepublic.vn/webroot/img/files/bugaxikojirovapufokuvev.pdfIn PDF document text
    • https://priscar.com/documents/files/8764246320.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6a51b9267---jisirazixi.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/sujotafepudizitejitomod.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/vunikazitarofikovezo.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/35696864253.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18ad743df---duvemusugux.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5986d5576---92209327769.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/61319138632.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/30b3c189da6d09fcbed8c1ed25f0aa00/xijenoronixax.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/816e480413fb31959688c115541fe778/zagekakutu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ouleohfh6h264859vkq2vpt1h5/28153542646.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/rojimumivebaximidepa.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/86343159712.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/018ac8edea2dc26355e067e438e13565/82346113842.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4cde7259---10496035798.pdfIn PDF document text
    • http://someteme.com/archivos/_20210713221731.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/mosetosokopub.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc91febdd0---16180731424.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/gabifatonod.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6061d507c---90864417550.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210505142841104.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730bd3ba57b---nasopewavotavutuluzevo.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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 16844 bytes
SHA-256: bf8493ea42d213f552b3c8e31ea0681c3a133b54ac6ae6c0b908a37782273eb6
font_01_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 11092 bytes
SHA-256: 41cad3ca2fa4067115615640be9d10e93b749c26c8b721680740b1af30b77114
font_02_sfnt_off00013814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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