Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e9b062eaa8ec93…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 08:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3cb7753897c94dab9d41676a00798efb SHA-1: 5fd12d0cb34722512c0ba954a06d3a9908d05b05 SHA-256: 94e9b062eaa8ec93435b6cf61975fa1f9c1e9a3ce00d15d240e598e3cc4e58cc
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The presence of multiple links to potentially malicious content suggests an attempt to distribute phishing lures or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6136

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/945ff9a32c2d9835c032e25fe7c8c534/robalorafafukos.pdf In PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/68174031314.pdfIn PDF document text
    • https://digicpictures.com/downloads/98086137266.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/25dc661fb2ba2d8ee241666a55584647/zubanobovova.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/piwubam.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/21285165173.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/45800545781.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/21c3b8aebfd94c2c2d418095ff989330/51937847938.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/pobinekotafi.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/2c5bfddadfbce485b1ed53c71f5b5e88/28112111165.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078deb881e0a---babuvugamafolano.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/gudabofopazobawefumureraz.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/45928127328.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf53dc78329---nuzukodabelavobapogovi.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/damawovovevipurinef.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17dcc7fe0---zenun.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/tolowulesirexipoxewipi.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/63862037331.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/93c77521ca5daaa1a5c49dec1c4d3769/81482980607.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097b74c75134---jifasegufubinemenegisit.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/57875398109.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/nexezexanimitepig.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/02d0bb7f6d3c2cc643fe01efe2fdd8b9/14630471566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fundamentals+of+accounting+part+2+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EF 18292 bytes
SHA-256: d496b38834e3139109bc51f4c6fca5842d8ec7e4b52431782e5848d347b1089a
font_01_sfnt_off0001346f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346F 11160 bytes
SHA-256: ddd3766b947794b2df94583701b892cc9dbf473989071fb049c473e26122875d

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