Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfa754d8df79d87…

MALICIOUS

PDF

115.2 KB Created: 2021-07-02 19:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 0430949ecd8b8a97c0db2764681bd46a SHA-1: b35a65ee62daa1d1b2d3d627ffd5040dc80a5f64 SHA-256: 0bfa754d8df79d87dc4413b182b152a7b719e282f96e20d3d9575debb4b81785
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3480

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://paliukenas.lt/i/File/45897483218.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a3540943d17043cbd0433cc8073b412c/migutomowaxoge.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7bf431d1---80502351425.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/585d58ce981f323bfd869fe01d9bf37a/30062345223.pdfIn PDF document text
    • http://amandamaitland.com/images/file/20799622916.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/wotesase.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86cdcff61---duvogavejiwowikuv.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/fajoxozu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/407e029fa99234af0da6585f78779195/5067306264.pdfIn PDF document text
    • http://elskenecologie.nl/files/xebimakevesiwa.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d91d861c---34542836097.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160834a6f58c94---13667956937.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/aa58cdc547823b2360e1b32846414f2b/bonisuwoxubasapivironobe.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b28b8fca43e---26154196245.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/3af02abb64fd13f2cab02f1d2dbc028d/mosopematefes.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/mitewefuwevodareritepabo.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa8244675---67866683584.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160849b18905ba---51594441002.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089bf652e4f1---4535631259.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ad766cc61---31619184054.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/fakoso.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/6f38d9196d6d8a9111b9156ca6d0a4f0/94301870421.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/98914fb1d1d8fef72b1f154bc3ba2dc8/nopobirig.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a510e016f9e---ruzoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=elementary+surveying+3rd+edition+by+juny+pilapil+la+putt+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
stream_005_off0001a50e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A50E 15832 bytes
SHA-256: d19b28951987c5429b0e59a4e53b3edb84b09f13dddc222edb642b1f8ad8482b
font_00_sfnt_off000174f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F8 11544 bytes
SHA-256: c075eb6a0e535cc0bd6bdf3fb84b01146fa3965baa9fd3cf5dc7f65c52cdc637
font_01_sfnt_off00018fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FE6 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7

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