Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f1fe4fa89c6395…

MALICIOUS

PDF

76.2 KB Created: 2021-09-06 12:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 85257459360c85ba4b1c118540b04ef3 SHA-1: 37f03c7be8d6fce5fc7b6b1921b1eb1b8aad514f SHA-256: 70f1fe4fa89c639552be4c10d6cb0233fc20a9f30bb78e6dcc62fa62d7dea2e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

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://magyar-logyogyasz.hu/fileok/file/fivupixerusoko.pdf In PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/18621340680.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/s12a1us8abbgl45546icq9vm3v/sunozogunefogud.pdfIn PDF document text
    • http://asfalon.com/__files/file/74159541786.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/c217a1d5709f1e438d2d43436863dd3b/6174876738.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/ruguzetemuruvofu.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/oanprbhc3aqlrg40738ohrsej2/86297141235.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f27aa439415ea4e17f439ab6a8407753/202062715.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/50445500042.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765f3c0d45c---tarofixesejugifo.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/0a031cae82b6380dd21c998e7943967d/62259917980.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/16647635519.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/59759741307.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/lutojojed.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/33475068250.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aaf08fbe6---35980351050.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/vowuxofibukikuvofilo.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/98bacbf3795dd09d0a242d1684d06c10/40138796564.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/tudiwa.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8428a5001---78277911477.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/85a69dfef6067b28ecb3c7b5ccb8f9e4/vulizinus.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/62291502376.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/71781360860.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/4306937954.pdfIn PDF document text
    • http://evola.it/userfiles/files/wunirodufawof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dna+packaging+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_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 10224 bytes
SHA-256: 1c2efdf1e6d66dd9021abea41592b13d34a286cd73f1ab9b5418ddece171f711
font_01_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 19012 bytes
SHA-256: 4a93d824b39d5a0cf13a242c19e51f637566fcb64429f32de15cb5e58dc407bb