Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e13a5f3038e36ac…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 22:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 55efcdc46b1b456725e4c54696a37b63 SHA-1: 99e733b260c04226cbb5ec060e4ab5d6c7546813 SHA-256: 9e13a5f3038e36ac767808660cc99f64310c9fed7561c39a4158c27d2ab28086
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.4857

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://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef518b06a07f35e90e3560a962a95339/kezaziz.pdf In PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c40fb69202b---59446054364.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/63132951619.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/20c32290b9e63209b0d3c84787b9a413/92169805242.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/451d9b4eb524fe6b66c4382eddf5c211/relufipinegofet.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/xadafem.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/112b346c336f1ecbfe352cdfef4be99f/sivalitasobagarewepi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609deb5eea564---rakadonulasuvimew.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/73a654ui62b037ggd2qonsmmvs/kolekuzedametipodojo.pdfIn PDF document text
    • http://www.toptehnik.si/images/39854948924.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/1ebc3ed18a01f435608fca83ef7bb9a5/xogobudokinasasa.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210624/210624174423743623gpxunl5xw8co.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/80210124367.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9fj1pr13fam2f96u182vo5b0cv/42365029031.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a07414fba---82362417880.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/85740733367.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd704bf277---dimijivi.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/mb1qa791b6g8hnf4maitcosr6r/zafojasufilowarakuj.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/wamurejo.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/db539ed871fb3897032b76299c131d60/6814324328.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fb917920---kuvetiwijigo.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/7408261a84881db2027dfd825fb147aa/32442211495.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/52553186d1db0c546ef7c66cd8d945b9/56340250892.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f6d98a396dda0d02b06b01887488516b/636259528.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0kiksldaetnjf3tenekm2c9735/7225080659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+most+powerful+special+forces+in+the+worldPDF 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_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 17732 bytes
SHA-256: ff4a9ce4144aa8790e2da8d0b075ce8b3325703ae7d4fed25069420048cf856b
font_01_sfnt_off00013ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBD 11036 bytes
SHA-256: 4ce42a1f65e2ffc866a244233014c0a57a18df8c01f24c4f29faaa75909f14d1