Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad6c3bfbfeb35fa…

MALICIOUS

PDF

65.1 KB Created: 2021-06-27 22:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bfee3c319006683c52e84cbaeaa1c05f SHA-1: 428ae41ca54dac675ea0ff222e9f4ae6db567e9b SHA-256: 8ad6c3bfbfeb35fa31d4b69250061b4188261b47af0a70c618e2bcf4114567d9
174 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs that act as a link farm, directing users to potentially malicious content. Several heuristics indicate that these links point to compromised WordPress installations and disposable hosting, suggesting an attempt to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=schindlers+list+piano+pdf PDF link annotation
    • http://innospectrum.eu/hirlevel/file/kiwelasebig.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/napizubogola.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec4e09a3e4---bepegotomufovoku.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/fozomezewibimozonojered.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aed106c7431---subinogudamirelusakevom.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/31cd074cd644b365770925d30071b198/xemile.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/98392059028.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160853db11f620---60630907243.pdfIn PDF document text
    • http://myqself.com/upload/files/bumilorozovaxu.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/tuduxaletelivikozojisud.pdfIn PDF document text
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/13508466633.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac95a1833---lutune.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c5ae815eb091a27d75e7f6adb349ed2c/41848390106.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/svj2k3p0selbm1aeovab907rm2/fowofovarogeponidifujid.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db2fdae18---32300419499.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c81f2614---28869774698.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c975192a8a---30701492391.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608790ab04922---gefetag.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/a480ca142b2d210205dcbe34d1e1f6e1/54291079589.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be17f457afc---zimarod.pdfPDF link annotation
    • http://hilltop1976.com/clients/24685/File/suzesitudegigopu.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/pedukajeruxosi.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/10462709910.pdfIn PDF document text
    • 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_off0000c991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC991 18356 bytes
SHA-256: f57acaf692e73f2d2eef12fe59ed0b2d468974906890ab017705b080851a1c90