Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ed233ef2fc669d…

MALICIOUS

PDF

76.2 KB Created: 2021-06-27 15:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ecb519eeb2dcc1465f00bafd7e5d868 SHA-1: 9ade716074e42a0a27ac120a5cd93f195adbac52 SHA-256: 87ed233ef2fc669dbe625572aba45aacfaa9a352648f3d27324d3c292c5e2a3d
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. These links likely serve to redirect users to malicious content or phishing pages, indicating a phishing or malware distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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://haps.company/wp-content/plugins/super-forms/uploads/php/files/2bucop916thng0tiuicr8qvbr1/sitovitasanopolutitedesig.pdf In PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/zajulinukijodonomiripefax.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/tugefituwa.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aae5e76f3.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9c2bc616b0151c45b9c915c1054116d9/xatizukoralomuxoketej.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b95676969---92086751535.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/ginow.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/36a9a6cd0c00edd163d6846ea649a32b/17192953582.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/89147842201.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/sogidolezuba.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5047ae04a---moriwonumotofasefodusotu.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/tmi2aga58778ntgibkkccc7ila/84712470723.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb4dd183b---77670658187.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e1b3d2e2db9a4c21fdda9118b25bc0c7/87436336527.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/f4il0rg0ru40hpqhm2u765and9/28893979663.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609759344432e---depesozepoxanafejaxenutu.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/208c32aea1848ad0bec85aacee599f02/litikorebatogab.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d627948f3---kovex.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/39121646931.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/92011965000.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d304cf0916---fakupubexijowo.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7763de446---wenewedizatodofasar.pdfIn PDF document text
    • http://imaginove.eu/data/Files/sizosogepowudufigagezogu.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f2b4d6ca4b8d3f2e9afabb721cc10a15/fomagalov.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf5f6827e4---39035041792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=good+words+that+start+with+u+to+describe+someonePDF 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_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 17212 bytes
SHA-256: 87076a339b17296a530e5c6f21a688406d2284ffda3229a2a987300bde88906a