Malicious PDF — malware analysis report

Static analysis result for SHA-256 673dd321ea1dcffd…

MALICIOUS

PDF

66.5 KB Created: 2021-09-07 06:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eedaefc2a6d6177c90d45a2fbacfb794 SHA-1: 67c61a7835ae9433be38eb8cd537959266f416f3 SHA-256: 673dd321ea1dcffdeb56f2054a88837fff41cba8b7bdff8dd6e87d5830b5a7db
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites that appear to be compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were extracted, the structure and URL patterns indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5834

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 http://baheth24aqari.com/ckfinder/userfiles/files/70269928017.pdf In PDF document text
    • http://gyobel.itpublic/file/65439730472.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///gesisor.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/botemofiju.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9081ba9e93171833f0e7141a136676c/dotekizajotasuta.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/ff01f11ac59d927fdfa95100617de151/putatebotudavilidewonixa.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/67587039536.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/07c147daa69ab7bd7b9a5d25bdb8a7f5/46291762736.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/5d7750e1b839797d58748fff0492468c/vopenoripulokagirativino.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/14876430940.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/23717752401.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/99293395494.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/38527217407.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/38579367531.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b80609dbadf---piwijifutulenatafox.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6a57a2e7e257d20dd0062e0efc224771/biwugajiv.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/53044620341.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edd2d528d4b---zijumew.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/58840728319.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/f7ec720df148b8aa0bace0e2be6be4b5/63348688674.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2c75e0b6---rosewigafunutobopoti.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/91400528590.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/53905573301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=geometry+textbook+for+enjoyment+and+challenge+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/kokobumujulazenafovadas.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_off0000d842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 11424 bytes
SHA-256: f74b47b2e49a89473f9ce7ec4cb8ba314fea9b035420edb54ec366f454249fcf

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