Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da27b177d1ea9b5…

MALICIOUS

PDF

41.1 KB Created: 2021-07-13 22:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: c140556a3d42eb6ee4e090d0c8d1abb6 SHA-1: e0961b9518db3b894ae0cb4484219b4bc77e3a71 SHA-256: 3da27b177d1ea9b577e172dff7fc6a96dfa40d6d04ab5a5c0bde0072f0e1ef78
174 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 and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8134

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=z+words+with+l PDF link annotation
    • http://bendhorseride.com/userfiles/file/wafukudikawax.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d72d8cb6f76---58673307447.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/qkje4qf4knohair9sje4l10sh5/tululujuwapavupusumuzu.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/fodaxexudemazimu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b220fccda5---rokixijoxijovuvedam.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/fulimi.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ed8q36nupqbqlh1kca1cvit4r1/ligipobuzig.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf686fbecdb---nukonubelupidasoviwi.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-16/20210516211936792064.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f5ff4efd582bae2be8ccdbc13612527f/bobasesiwebojekukeperoku.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adfc9683293---80547183810.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/fimaledewe.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096519d9bbf8---peduba.pdfIn PDF document text
    • http://alkanboya.com/files/file///43769366998.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/95784305370.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607978351ca0e---78635002479.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/ravusoda.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd41bed2e6---11857056025.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/10462750694.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/jurujivizoluvetifitimezu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/bevaregonevademuzo.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9ba8565fa29bee2ceac7aa1e740180f4/85099545766.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/05bf96aed283a8bf5380588a443c0ec5/sakewokudi.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/5829519225.pdfIn PDF document text

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