Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf4619a1f4cd81f…

MALICIOUS

PDF

61.0 KB Created: 2021-08-31 04:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6f142d2b50e2b25991ef154df09e18e8 SHA-1: d7f9ae2c2d680f9d08f8dfde1fde4247b2b67df3 SHA-256: ecf4619a1f4cd81f6ba0a0e9b43b976be4fbd1270b9c7433e2729d3cf279dd87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites. This structure is indicative of a link farm designed to host malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://abarappresentanze.it/userfiles/files/97531796262.pdf In PDF document text
    • http://sowa-architekci.pl/userfiles/files/90040475836.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/20806433294.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/wamavodokatorezidapebo.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/tesutewujunodexigedag.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/cfc6f29982261076ddea5961616c1709/15188399930.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/58350952080.pdfIn PDF document text
    • https://triosms.com/userfiles/file/wofiger.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210813_100757.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161144d08bbc84---72513840365.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609508b83a001---88582745970.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f323318ad3---datuzajevude.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/juderajewugatojudawutape.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/19387694335.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/wumevibenimaf.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/37393cfe2074fe1f75997b19ead32c75/nuduwovuvivuxo.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160780833dae3b---redusugusaxofinasiwapazo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/26m28r2kc67p39s4q8cpsvbl57/bojarolavapumomiji.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/2nrqcn0vp31hhd02krapgc4hri/33647871327.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ecbf43fd6---wogiwatuladujuvar.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3f491917---37888946102.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2f8d632cc---882746374.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c45a79ede86---55575225578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=smiley+face+in+outlookPDF link annotation

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