Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d32c8d723b575ce…

MALICIOUS

PDF

70.4 KB Created: 2021-08-29 23:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 758cb41ed39cf0e23e5002e7e8a8e133 SHA-1: c919c0e76d5fc077596837a2afbeca3d7a52ad7e SHA-256: 2d32c8d723b575ce7853075036609668d8172006baeeaa6526c149951fe92173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a strong likelihood of malicious redirection. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user consumption but rather as a vehicle for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://accomplishtheimpossible.com/userfiles_ati/file/tadanediradadagojutagut.pdf In PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8b2a26d5dd34c15405cd2549f4710e81/muribovufebatalibexate.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/59217090699.pdfIn PDF document text
    • https://menu2uplus.com/images/file/901452154.pdfIn PDF document text
    • http://bjallstar.com/upload/file/32876582695.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/vuvisere.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/wisumewefipujatutuluj.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/64811171766.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1831871d4128556af3a73b8ce570742a/gegunigomajikitevawom.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/faxuziziniredifebitow.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9766542b5---79726665133.pdfIn PDF document text
    • http://e-hematologica.com/users//file/lipupolijolibajoko.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/runatetapuzul.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/39700056848.pdfIn PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/48980061224.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0bda2504c---wikik.pdfIn PDF document text
    • http://446888.top/userfiles/file/5391973364.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/bovijalikazapuzot.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/59191706604.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/587a2d6cc08311256ad7edf6508c9c8c/11052025772.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858e26d783e---julafuwuv.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/ad7fc63ed1fb513752d9b5d27f396acf/24682437305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+find+net+new+equityPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD05 15720 bytes
SHA-256: 8d1998f9d21f80d9b6bd55e3cc7b61b83e8452fcf81d4102be7dd49b48229e5f
font_02_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 10308 bytes
SHA-256: b4e67efbdcd592064cb667c178d729c60024cd38d4558ab2df247e72e0481c91

Open this report in the interactive analyzer, or submit your own file for analysis.