Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ba67317e1a7fb5…

MALICIOUS

PDF

64.0 KB Created: 2021-09-01 07:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8fcb9d6a4a1e1e7a18f1f4f03777571 SHA-1: aca597c278ff5a35086565899687b51005144303 SHA-256: f4ba67317e1a7fb5b0adbd5eb216b885c810cfb28e68ac8443913d04c7e07884
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9427

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://chcial.ru/uplcv?utm_term=federal+republic+of+central+america PDF link annotation
    • https://theshamrockpublecco.it/file/kikusipuduremibixojowiwoz.pdfIn PDF document text
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/piredipirabadopuranos.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0aa5a75f---65723474094.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9d1685b5eb75337efdade7ef35c5be71/50259847642.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/61698108408.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0399e0811---witokafipevepibosikusuvib.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/0ad2a2447d75be28a8c7139ec971ec67/dikijapanezapopadiwebed.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/burolefesexuxivopesik.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/sujobajen.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc7878ff56---81350560492.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/7057824437.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/nimexumumopidopuraw.pdfIn PDF document text
    • https://ka-base.no/images_students/files/55666881725.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c0625f056---xevuxelawekasowazatalax.pdfIn PDF document text
    • http://fedoro.ru/upload/file/79374705602.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/etrdclgnvbep4jnl46djgslr02/98002834294.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/milafirapar.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffddad752e---guresibalamumoz.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/j9q7frg4ar9rtvjap3d0vimiv1/70368823312.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/gukefiwojomuvegogi.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/cebe765b42edd2b0511a4a636de38108/23841819120.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/17655509716.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/18259165350.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_off0000c0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A7 16276 bytes
SHA-256: decbbde29b97f12a04c1262a04c40b416c3934c64c7c44041753a80516228678
font_01_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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