Malicious PDF — malware analysis report

Static analysis result for SHA-256 d857bbfa94d0bc99…

MALICIOUS

PDF

67.8 KB Created: 2021-07-08 13:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be2310466da7bd9cc567dba71288b300 SHA-1: 4a59edc7c56301e53be67ac80b9213a6e9d350ce SHA-256: d857bbfa94d0bc99ade911a22ed8564452b8f8869e00f9c8cb99f46b93dfc7fa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS upload directories. The PDF document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings suggest an attempt to redirect users to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4829

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087715eeb6a8---wikofifasepitomewip.pdf In PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/8mu21dumbrqe48tq5t8gngvi55/72231545187.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/30429571178.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/e80c6f103fe93626a165bfa497ec3b19/85473266317.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/koxijazobagedobixovadi.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/repowovamujusurud.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6acb782afb9818581483a30c0e3120fc/kagosixu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160859f953abc9---47272798924.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/hai5bj0e17a3iu7soch4vr5t45/sipimixibeta.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4e947d887d748aa9353de25a60c27368/lepelufilosojuvi.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c33cb8b62c7---77853278966.pdfIn PDF document text
    • http://learningkey.org/userfiles/xuzegevisamaboledixomir.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ues3nj7iq5cktr511v3q6leb6f/luvidadim.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16098909e799ed---85245939185.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/62927825149.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/00b60fcd2b950ca7ffb69848530b9716/60480427861.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/1e43c616e74cf33b4a28f7ab357a9347/83875724685.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64957c9d98---mukexabukisitogamidet.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/67599314023.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853ac85abed---wijujetunib.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5ce5f7637c2f0a9afb153cb5dd25db1b/todutamiwemugabovivupix.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/80704793312.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/tma9o4meijt2bfb5ep1vrn7ig6/nogutu.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e22c975b166---dufuxusupafudiliwutilol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cattle+farming+business+plan+sample+docPDF link annotation

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