Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3eace38e342b466…

MALICIOUS

PDF

56.8 KB Created: 2021-09-28 02:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8bb928c51d47c7ffa302fdb920eddf50 SHA-1: f45fc1af3b8a809aa2c9e3b196e16722040ff10b SHA-256: c3eace38e342b4669e5ec70139a93cde4d5af76b23e8430f0bcfeee7206c21e8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

Heuristics 4

  • 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
  • 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://ukmalayalamnews.com/userfiles/file/sozumixolusojokuposaguj.pdf In PDF document text
    • http://tnslib.net/userfiles/files/43697206817.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/27948484820.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/patudapovuwubuwebe.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/85841023879.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/bimujawugosagagigi.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091011204240.pdfIn PDF document text
    • http://ihdbd.org/upload/files/domurozub.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/48719140283.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/37519209446.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b9c742e2a500c65dc87fcfc9fe850beb/jaludutexixunarobe.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/xatugozofoporavenuza.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/bosinewazu.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/54707299473.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/ziwipadiv.pdfIn PDF document text
    • https://jck.ro/userfiles/file/nemaxilukeforebogado.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/23061391549.pdfIn PDF document text
    • http://baove24h.org/upload/files/40560933384.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/didigosufiluluki.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/65628748594.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/ritunigobex.pdfIn PDF document text
    • http://khocabien.com/uploads/files/2450531039.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/fitazanezefuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=debug+cell+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD76 10272 bytes
SHA-256: ddc33ce966b13486570847cd483604192cc91c85cc7dc7279fbecdb60c273f25

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