Malicious PDF — malware analysis report

Static analysis result for SHA-256 571dd46848fb6e34…

MALICIOUS

PDF

42.7 KB Created: 2021-09-26 23:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 41e3c257120fd65c8d54261014f41040 SHA-1: ad0fe33ce878af375d50aa2d29f1fcdf4671f10b SHA-256: 571dd46848fb6e34b1e5b4cf7de5ed7757af8b342c37d76f24bed52f51980d67
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the PDF is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8035

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://transportdiverse.com/uploads/files/kevusevadi.pdf In PDF document text
    • http://medicareclinichowrah.net/faboriginelist-braj/userfiles/file/memefefewi.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/24017674744.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109201012246466.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/zixim.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-7/20210907110814898685.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/85988689847.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/pezabej.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/tubexinovekuxigikilatu.pdfIn PDF document text
    • http://gabortech.com/admin/file/89581654242.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/29271170740.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/60048390737.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae27b3d199---jigerixawokarudiku.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/52026450307.pdfIn PDF document text
    • http://mamitobe.ru/files/file/92750515621.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202195_7181_758.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/felipawudejibuzowaz.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/zunowaworuziniwisetinu.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/voduxuser.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/73148229633.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161490fb297f22---worodoruwefotogumexikomar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cast+mobile+to+ps4PDF link annotation

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