Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dd976440643e7a…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 23:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4eaf398c54c7c5ed846403ed5e35067f SHA-1: 705ac306caf0cdbca399869ff7e87352d30fdb57 SHA-256: e2dd976440643e7a4d0f4134cb0b9f582cb9529b47513d58c49afb81cb976e5e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is designed to host many links on disposable domains, further supporting its use in a link farm for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f14a3be018783e4ce56f538808a17aaa/bumelel.pdf In PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/21835825235.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/sagidazexotitakad.pdfIn PDF document text
    • http://ledins.lv/cms/file/xagela.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/34962520009.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/zuzenenilo.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/warekad.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/38145593703.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/zinenib.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/52447716158.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/51848370875.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/3490308801.pdfIn PDF document text
    • https://expomediainc.com/upload/file/tumibilelazoxudeweruxu.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/3279654621.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/witugeguwovunijevixibavab.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/baxaletijekurinorofisexev.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/donuxikepopuki.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/55053410909.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/sapixafubi.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/forulezodidupetiriwopagew.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/sobipamigojurowugemazoje.pdfIn PDF document text
    • http://gapp.fr/medias/files/53812286525.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5d6811e7080b97dafd8354b043481d2a/dekibikosas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=wack+your+exPDF 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_off0000b451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB451 17820 bytes
SHA-256: 648ac556ac8d69f564f090e93e0a491e6b62c6c6935aaf599893d64bf3e96c5c
font_01_sfnt_off0000e0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 10116 bytes
SHA-256: c63a8988ae56b6cbf162b640359738459f8cb288d49eda2645af95e26d9b67d8
font_02_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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