Malicious PDF — malware analysis report

Static analysis result for SHA-256 5779100e2cebc947…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 16:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3392bc0b10238dd1fd5871d6ac9fbb84 SHA-1: 09ed3638abdc585cd59aee9c73075de72e268c0f SHA-256: 5779100e2cebc947a257037916b0f33a60a5703bd2c8379026854e48737dee4f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a link farm on disposable hosting. One URL, 'http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/wejaramixovazawaxoj.pdf', is directly associated with this heuristic. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further indicates a phishing or trojanized nature. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4864

Heuristics 4

  • 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
  • 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 http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/wejaramixovazawaxoj.pdf In PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210905_4A4F0F7DE0216DF5.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/nopakaravimosafuledadosav.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109080757007637.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210904233544.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/95304540815.pdfIn PDF document text
    • http://starma.pl/files/file/kunodiwaxo.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/famudope.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/82809665258.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/togajiwabatonejo.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/xumataze.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/91243394280.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/87915988839.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/71878673458.pdfIn PDF document text
    • http://prmakeup.com/Image/files/winufevuza.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161387b2a108a4---81250474309.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/zopivilojozaxapalufuzer.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/1801785209.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/reverojabijosufunesa.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/motojegovuse.pdfIn PDF document text
    • http://ecole.ru/text/images/file/67098931837.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed55a4f8a5---61806200370.pdfIn PDF document text
    • http://japhina.com/upload/file/bodupol.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/zigexilefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hipaa+compliance+pdfPDF link annotation
    • 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_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 17604 bytes
SHA-256: b47e79a95888fa4080f4aff44b67a8fa942332bbe8cb9620e43d575dc258c9dc
font_01_sfnt_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13722 10408 bytes
SHA-256: fb522743d9eb97ad8d53fdcf48eba81b34871213a3e94abcd3222168c39f2b40

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