Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79215ef4f168896…

MALICIOUS

PDF

86.3 KB Created: 2021-08-17 00:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 45cf7e9c10bd2861b2c7ae46f49deb4b SHA-1: bae11ba0c4eb0286d074f3131742c293b9c7e752 SHA-256: e79215ef4f168896d8dda0d13c810772a97d1bb5484daf947bc5c8b2234f9069
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a large number of external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, suggesting it's designed to lead users to phishing sites or download further malware. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://nomylo.ru/uplcv?utm_term=cuales+son+las+medidas+de+la+cancha+voleibol PDF link annotation
    • http://viprealestatebrokers.com/userfiles/files/komezajizibivudamesiw.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/cb9d09fd55d121f1ac96e8233f2baf4d/87867246371.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/dewozug.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/3523941310.pdfIn PDF document text
    • http://e-sportis.com/images/upload/sipewina.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b9113b73003820fb7fbba86813e8e4af/56495874955.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4a5da81700cdc958b60c2ce871f2ac75/72644313395.pdfIn PDF document text
    • http://simonide.org/userfiles/file/vimovakopoxegonekabe.pdfIn PDF document text
    • https://penzion-palice.cz/content/xemesexiwejoribufujo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b3865d56177a95bdf8e419a65c373da5/gojazixaxikijukejik.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/48962471697.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/pipuwikewinapazudaf.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725091da157---11493860689.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b412c2692---20814667642.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/30807724332.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc909aa59---79408555748.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/xapapanejaper.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bokixigaguwomipawinimi.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/pipujalofukifova.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/gajojakis.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608905d63bc20---59503889077.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/24060549545.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/29726a4b784e12de267ce2f881fba066/tiloxavusewisopalak.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/mevixexibesapigefizan.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/kofabixotopakinebida.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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 10772 bytes
SHA-256: 20bb320a33a5462cc934d3b2ec7100f3506f5c77305b5bfdc1ab47f3a48634ac
font_02_sfnt_off00011b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B48 17836 bytes
SHA-256: e32db2833281afc1634903d6f82433a82687cbcf69aaa9a85e8c7863470995e8

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