Malicious PDF — malware analysis report

Static analysis result for SHA-256 f734637efb7f1049…

MALICIOUS

PDF

78.1 KB Created: 2021-08-12 09:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ef9f1792485c51a78c31ca22a172ee74 SHA-1: 613c2e45ed7bd96c8609844d3a37cb05a80c6f60 SHA-256: f734637efb7f1049631f7a9c47f2adaf537e3d535e07ad5ff747541e8ff73f98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous external URIs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be SEO manipulation or redirecting users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://medvor.ru/uplcv?utm_term=ejercicios+resueltos+de+algebra+trigonometr%C3%ADa+y+geometr%C3%ADa+anal%C3%ADtica+unad PDF link annotation
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16113182923b1f---78259373264.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/49670523332.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/debojepal.pdfIn PDF document text
    • https://yuss.it/file/32995945408.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/8673457452.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/64099900633.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/52447211556.pdfIn PDF document text
    • http://pinxedien.net/upload/files/65010083911.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/rafuvizenizobinorabi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7a4ead5f66aabe9cdda293d9f5e414e3/piginuroredolalisexafe.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b25e205cf3---dilesutebotasuza.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ca88a049---nemejewaxikutexasigowun.pdfIn PDF document text
    • http://www.heksan.com.pl/file/73859839329.pdfIn PDF document text
    • https://mmszke.hu/files/file/6725131721.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/53481382520.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/2306537248.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c66db1f2e---88977572183.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/222535322dc00d687e5c6a012a9dd1e2/51658613008.pdfIn PDF document text
    • http://www.asslar.de/downloads/xuwexoviwafufefoworu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1210ce6ce---futibugoberuz.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/fokefadom.pdfIn PDF document text
    • http://immopolignano.lu/images/zigominazuxilapudu.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc814615c0---36615378392.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a1006228---13280281799.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_off0000ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 16548 bytes
SHA-256: 3dbe3df7e6609ffdf8288119953f18923482aca37e3d0ec3e8c3429165bf5a5b
font_01_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 11240 bytes
SHA-256: 6d57ccf311db29d5a8431fc23215ba53557314c3051795f12bd7818338f35357
font_02_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.