Malicious PDF — malware analysis report

Static analysis result for SHA-256 e212aff130cb1d47…

MALICIOUS

PDF

89.8 KB Created: 2021-09-10 17:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 216b30eefa4cffdd787adee1ff335498 SHA-1: b6a869676221127932587b741236b52bccb2d890 SHA-256: e212aff130cb1d476f0752b1341f0b82ce4a6783903d462c42fd6eb9de25ab73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=aplikasi+kamera+android PDF link annotation
    • http://noclegsosnowiec.pl/eurostyl/photos/file/kenepepozunokonile.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/17176786139.pdfIn PDF document text
    • http://stonebreaker.at/faniwaxinoregesimeze.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/54129054299.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/72197833693.pdfIn PDF document text
    • http://woodwaysindia.com/uploads/81773523125.pdfIn PDF document text
    • https://ancoraeducacion.com/images/tojitumipeji.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/ridogovop.pdfIn PDF document text
    • http://metapolar.hu/tmp/98717534699.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d92a10166b1f91f79a120c25b2ecebc0/xezofotutusafi.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/fajogenanumati.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/tozekigizepogamuxu.pdfIn PDF document text
    • http://imaginove.eu/data/Files/lifuvawuxijasesutekoto.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/44151448321.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/38205533554.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/fasin.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/kanevufisasub.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/79523095771.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/votasomumiwonalogidajunir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e4eedb12---53315199860.pdfIn PDF document text
    • http://irths.com/upload_files/files/62511986429.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/sezelewejokupegixefujavaz.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/60782165397.pdfIn PDF document text
    • http://master-br.ru/img/file/lemabamegejobomijobaxugex.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_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 16736 bytes
SHA-256: e2e960c0f4d93e87f6cf26512909a84cbed07afbe9abf48a16f24c264426a488
font_01_sfnt_off000129c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C8 10528 bytes
SHA-256: cd9c4d5242e5398a202d1333b01479df5a4db1b98fcad0f493d14893de595a2e
font_02_sfnt_off000141b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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