Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bdca1e2e972257…

MALICIOUS

PDF

63.7 KB Created: 2021-09-18 17:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 69a25b793e27edda2da9206b06e16980 SHA-1: 16a315c00c01794b8b42b7c163413ee787e01d88 SHA-256: d0bdca1e2e9722579aeea73094f5d352cb48dd7f10e8197347b0df8c9a29e7fc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high density of links on potentially disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7503

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 http://vmkmsz.hu/userfiles/file/zumewitofajakurarolid.pdf In PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/85706530832.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/pikeweverafesetasud.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/57987483168.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/fugunedova.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/zevala.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/28562074723.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/69579019227.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210914143318.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/soratuv.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/53513253962.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d565aba37---78845775650.pdfIn PDF document text
    • https://petikdaun.com/contents/files/febevokivitasamowaxoxidu.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/tutewuwubudogezeteloro.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/tudevawenupixajiz.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/jezusavononiv.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/kakokexegotawijinazid.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/64245412050.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/79232130828.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/78971375984.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/zegumepatatafivigizobos.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/9599610179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fifty+shades+freed+nonton+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDF 10544 bytes
SHA-256: 407646e3224543b64c6bc25dc0f0d6cce98fd80d5f0973927a88816e0d46a5fa
font_01_sfnt_off0000d5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 16804 bytes
SHA-256: 1ac26cbda799d29f29921e3765f165b8f6200d98786ce941b62d5ef60723a435

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