Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaaaa78b34dda46…

MALICIOUS

PDF

84.4 KB Created: 2021-09-15 13:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 35ccdce9ccfbda8e00f5316fd3a4a8c4 SHA-1: dc23c947190248e45216f290cbe3616ea17b0fd8 SHA-256: 7eaaaa78b34dda46ef1affee1c2c9d5f754cfa7c12b4c239f8cf4a90b60550f6
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://pistant.ru/uplcv?utm_term=removing+ads+from+android+apps PDF link annotation
    • http://kapsalonindex.nl/images/uploads/gavinoda.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tm61k1kq5jv1dneoe9c7icbd53/53382521097.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/92176686143.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/29838049420.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e052378d84---81987644074.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/39593646707.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/jirazojilotipune.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/lopakapamikopeludupeniko.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/49979334303.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/gesenodupetuginolabuwa.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/34513175116.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/vusexopawutagiw.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/fsg1pih300iooj3tjtp3d9rqba/35433520712.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c75c23245d---7519304240.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/70986869460.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/95290394405.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/65246976158.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/wujoluma.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613aea466cca0---vokerisoxavo.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee193be202---36751274576.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/76832605647.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/sifuvatefij.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/lolan.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/52760570743.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/rekalutuwox.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161384e445f17c---19575788117.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/66537712403.pdfIn PDF document text
    • https://davaocarrental.com/images/file/vofiworagibanomidor.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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 17380 bytes
SHA-256: 97a479b54fdd0f363adf23a9d921865ebe1f7889d53844cc995ae1a555a8ce0a
font_01_sfnt_off00011345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11345 10808 bytes
SHA-256: b2599158742087df89916b61e8ac63c77db309f011015a063abae21eea58c852
font_02_sfnt_off00012bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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