Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c44b006745d5928…

MALICIOUS

PDF

59.1 KB Created: 2021-09-06 06:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 29f47a61214da89441c8c23fb76743f2 SHA-1: 4763264ffcbcc216993cc277288521652c882521 SHA-256: 7c44b006745d5928b07189ec93282eb9df9b6746ca7cded351b8f9987f3c77ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also flagged it with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8925

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.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74b594dcad---62353264666.pdf In PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/jokopef.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079fdd9b1b80---78539150967.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d49e48fd9---66966046110.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/dejalojijovasijavili.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/743444cc467acacdb128109ae7a89ab5/22218409933.pdfIn PDF document text
    • https://guijek.com/userfiles/file/disulenopenekixapiwanaz.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/79792541209.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/0eksksiaq6v59ueaobc0koofeq/48351890366.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/sorirokib.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/lixexigonulilexenewetibon.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609eef4cdc072---zilajunevaf.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160722fc44eb13---30474205025.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efec7a1fec---75877801259.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/xawupogekogoke.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/libafuvuzatosomedov.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/77329515240.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/99596542867.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-23/20210723091154803664.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/xoxovofa.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/8812412681.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/9735633962.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/55338676773.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53cc6d5cfd---kagowikikepemir.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/40697209504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=danby+microwave+dmw111kpssdd+manualPDF 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_off0000c1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AD 18112 bytes
SHA-256: 5fb34d39bfa27bb9a79df73fab3dbd0e18d53f6376a07fbdd941638d966936f7

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