Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f59bf9724b8d5f…

MALICIOUS

PDF

77.6 KB Created: 2021-06-28 10:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a2a67ab4115828f591a037db745a0f6e SHA-1: ac7ab481b27daee3edda6f1dc4161ac9249d47c1 SHA-256: 92f59bf9724b8d5f9d18422979585e746fcb623f124281657e5307a6eed0d867
154 Risk Score

Malware Insights

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

The PDF was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7403

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://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098682130db3---62806901994.pdf In PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/f18e3982116ff1b1c100296a62f32f9a/legovezopem.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608138492e4a8---68165203705.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/39186237639.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/84620790849.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608af0d405f19---70739004058.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/zejosijidikikow.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b051a574479---watoduzularasamemimu.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/fdf7a83115a794125387cae4c6a63817/13026819428.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4893205e4---97437831571.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae052d83690---88924221473.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608394ba9401b---29404209946.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/buzuxabusojikivupojelige.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a28a126cdb0---80117375501.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/03f541e16fd496836c605bdb0120d88f/wopewezerarowemiwi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5a8f8a0a6---32861340414.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0b02eca08---77709198118.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2475aae57b---zatumafumukolonivi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27bbbdc49---62471391318.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e319f28547---87374325875.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/eo1gffvk1176uqme7sgsltdqu3/36861535496.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/visede.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ec02280b8---dobaweterasabu.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/30940309507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+draw+realistic+monstersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 10608 bytes
SHA-256: bd0e6347ed9aa53be64ef555e8f1da737f1ee67b7fafb6169e5ff1b5674f77b9