Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ea7689fb9fd1d8…

MALICIOUS

PDF

74.8 KB Created: 2021-09-08 07:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8df05e16d8424ae0317c955b98150be0 SHA-1: eec312565ecce0e22f1d39573c6f3143ad3fda30 SHA-256: 68ea7689fb9fd1d89cef438f931dafccc46f5def800f5cae2a810f1bbd12cf5a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised websites, many of which are hosted on disposable domains or use common CMS vulnerabilities for file hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary function appears to be redirecting users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://pistant.ru/uplcv?utm_term=swatch+irony+chronograph+manual PDF link annotation
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c04b7abd---tunikonemupuvewugofirir.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ebbec7f00ae8f86462a730209d59278e/pofedu.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/25369961930.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202181145326128.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/81cc5acf01ef3352f53a59638af7c91d/41276200981.pdfIn PDF document text
    • http://teraval.cz/res/file/xavasakabuworozamobiluni.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/sibafawegoz.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/wuwoluleketepikaji.pdfIn PDF document text
    • https://rajakedua.com/contents//files/31271141232.pdfIn PDF document text
    • http://khocabien.com/uploads/files/79126240514.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/guxodinesudupataj.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/704a9c8509621b413700b1c67936daac/gifuwabagonovofuvojo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/ae3a78830611fc8af0d5c2010525aa4c/66907487940.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/7249392875.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/jawigediseritisujidabiv.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/30b50b7f7e4ca86a02284d122e9eba30/51990373468.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/fuvijoloporaxoko.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/pafuzokavitajinonefikopek.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/04a9d6072139b3f0b44344acdec9bd4e/wamira.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/tepoz.pdfIn PDF document text
    • http://adveotec.com/img/file/27658981130.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949daa24a53---kilobozaraje.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/giramubatufakajig.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/78473867630.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/56005406688.pdfIn PDF document text
    • 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_off0000d8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 10896 bytes
SHA-256: 31a3394e10e59299a00b6de7839f80b80ace14998f5738538857780b3a8385a5
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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