Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8346c50ac23c05…

MALICIOUS

PDF

62.3 KB Created: 2021-08-12 19:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8283957d326c90692d8fd727524c3586 SHA-1: 89c9b8dbef13fa268fd81e5ded0ae09054739474 SHA-256: 5e8346c50ac23c053c3b4d26e9ad3200a14d4172d3ab603703b237e99b15c043
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload delivery mechanism. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8900

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 http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55409c2dd4---xaretotijovixowezimobuke.pdf In PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/78830597217.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072c672372d7---tunejotepugaguliwag.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/79776170263.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/c3f10b3ea6035a1f766ab36949ab6255/susixubogavowugu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d389dd602e---daguzuxaxusadogotiralot.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/74723757355.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/21984842759.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/71276432331.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/09c383be8c2fed26e6e46054fd568411/supujuwenarumizusemiku.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed081dc2a---kuvuzi.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/8344220590.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/tizewob.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f336b1d3ee4c6f9e4809270fdfc3892e/63299497665.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f689d19c0---wumaxipanexopuliwapiborol.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa007f3461---34065724196.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7cb990a1e53d880e3685e78003b5f960/girusabuzi.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/61799916343.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/muxipesofawolexiv.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b24cadf1a---49700869889.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/jepetasarameb.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/fukajugojowewur.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/29597887394.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1d7689bbdd9e7c38f4d0bb43df4d142d/vodanuja.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/j7fvldrsao6jjl0hnj24mukbai/takazaduretilenupuwafikag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=skam+france+temporada+4+capitulo+9+sub+espa%C3%B1olPDF link annotation

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