Malicious PDF — malware analysis report

Static analysis result for SHA-256 7672927902621f8d…

MALICIOUS

PDF

80.0 KB Created: 2021-08-06 21:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 230babc741628e84bce1a2bffe15c02f SHA-1: 54758037ec7131e4a45dd64560fc07e28c4880e8 SHA-256: 7672927902621f8d216c40e0d02937a527ce20e1cc7fc5a832037984879ce84a
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress uploads and disposable hosting domains. This pattern is indicative of a phishing or malware distribution campaign, where users are lured to malicious sites. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2749

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 https://oniceh.ru/uplcv?utm_term=how+to+tell+if+my+old+coins+are+worth+anything PDF link annotation
    • https://thinkhigh-tech.com/d/files/poziti.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/dpm72ud9ed7e3lkj4fmn0e6im7/biwevowor.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/fudegapegifon.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/3769442062.pdfIn PDF document text
    • http://alkanboya.com/files/file///fuzutalanijuva.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/redexisukelawenagexajija.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/pidopexesigolofu.pdfIn PDF document text
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/26406603271.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc93b0cdf1d---vokexefa.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mv3dtgo89hvmtfbn6e9grb6ii0/lojoruvawip.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/76137164413.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/557d5a453c384df852e62c20cc59b259/72243445615.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/75325825449.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cd8cef41e---kogunareminalokoli.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/11ff5476acdf8e755404e73e4a9d3146/24662148947.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/najas.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4efcdc747d---10521516048.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e9da2e512---rofimojedaworupona.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1f3fd49105ecee2634417ab515bddf3d/87093459460.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/lh21v2tad6o7j6eus9orn77qoo/narozupi.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a9fbb241a---tigod.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2428581a57---kelogovipozalo.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/48247524893.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/43639045264.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/mixutoziwufenuz.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/tebusefopifobipejali.pdfIn PDF document text
    • http://iltorg.ru/upload/file/gugonodome.pdfIn PDF document text
    • 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
font_00_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 16236 bytes
SHA-256: aa3974cebe62a8065655324adbc3b5ef14831f7d63007d2c53b62dec1ca0b056
font_01_sfnt_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 11116 bytes
SHA-256: ed4e3242dec7ba39e9fd71ec334221883d6f0031195be7d1e22b3886d2123d85
font_02_sfnt_off00012c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1