Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7952206d1b6ab3…

MALICIOUS

PDF

79.8 KB Created: 2021-08-20 13:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e0aa4398ac5ed18868aa235e5575686 SHA-1: 214f14c5d01b3e8660f1445601f0df47d048f2b6 SHA-256: 7b7952206d1b6ab384712b80f4f30c2301b8cad45793da0b6eab46c54ea36b9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5017

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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2c41di3ul9maopt7aq6kca9rlv/betanunixutigot.pdf In PDF document text
    • http://derma-dts.de/files/file/ginojis.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/rumurudelurenupedeji.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f9de76de9---52536775358.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c10512e6aa---nukavixosatilojunu.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/wibuwowadakuzomesetanam.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d5f684ec5cc1d7b3710367c2561b619a/gavakuwiwiramolala.pdfIn PDF document text
    • https://123natura.com/stockages/files/15598618506.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/sunubigupete.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e621437dc8---1788090449.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/6916365199.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/pefulalo.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/50e3f0ecb3541b6a90bf7b71d0139f62/kebewizigiv.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f552d42364---85123117542.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdf40eede8---62621712968.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/95277059392.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e81d2556dfeca1c7e698233f1f10b6df/sidunugaxulotomu.pdfIn PDF document text
    • http://flomojapan.com/upload/files/nukumiteg.pdfIn PDF document text
    • http://accountingworld.in/singhania/downloads/file/lakogutapubilolafa.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/wegijoradinatesapewitogop.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/busufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=super+smash+flash+2+unblocked+76PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/dd22327229959b16a1f8da985447d4be/4852488007.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_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 11440 bytes
SHA-256: f55b44290468788e86b98145df990416a999903867762b1f2a33628a5c1a619a
font_01_sfnt_off00010c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 17592 bytes
SHA-256: 519030ff2b69551b7d4d67619169b372da75ebf72d77408493892dff12141675