Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb5c3b6ea78ecac…

MALICIOUS

PDF

68.1 KB Created: 2021-09-01 16:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8ac716d69a7cdf44e324f003974cc89 SHA-1: 45bc150df0238a62846a976433c1aab924b3d605 SHA-256: 9bb5c3b6ea78ecacac6d104d485453fff8f969be64021c1d674af2114d835d03
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The file's structure and URL patterns are consistent with a campaign aiming to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3630

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 https://huntic.ru/uplcv?utm_term=going+to+the+river+lyrics PDF link annotation
    • http://champagne-marc-chauvet.com/images/files/59393759394.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/lamimamexagukuri.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d479f96b42e---nanozeliduvojibekuj.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5fdbd88f---pilulipa.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/45252754850.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/12099010447.pdfIn PDF document text
    • https://brod-plovdiv.com/images/56902180198.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/bugufigunexupunotuse.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/8446451229.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3501afece---36948619876.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/86562112190.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607db807ac7a0---fidutomijebuxebemenek.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9mkhd7fu9oic397ioj8vfacs94/rejagir.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a18ddd8c8da---358961870.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3439ed1b1fd714b3165f1ae81fd723ae/81403503363.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78efc0c020---wesemu.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/zelerisedurazovesoli.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb4645ac8---deluraxexuja.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c78f3425c35---17653081746.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ac98cf83727---57985214291.pdfIn PDF document text
    • http://anm-av.de/uploads/files/77111561041.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610018f45a663---78151594087.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fca112a7f7---sexuguvolopixifuluwegamu.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a58648af48c---99986090325.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/41342294146.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/c5031e0abcef11ea7b7957826c6e9d6d/zozedomulara.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_off0000cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10568 bytes
SHA-256: addb57ee165355d18456a4cf95409a43a0f08e6d28bea093f869c195f42e6bae