Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a97b7050ed6473c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-04 11:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2bab08c1d3c8e91389173c308984b8f3 SHA-1: 4ddfdcb8678d940543360b55db66c5064286fe36 SHA-256: 6a97b7050ed6473c1736b3ea4683b270afac17b54f596809f8c8f86f387dec91
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to execute malicious actions within PDFs. Furthermore, the PDF acts as a link farm, directing users to multiple external URLs hosted on potentially compromised websites, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6848

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c41ae91deb7---vegara.pdf In PDF document text
    • http://natpuedu.in/userfiles/file/84953724429.pdfIn PDF document text
    • https://subarini.ro/mm/file/perufokalab.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/93729058282.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/6qio749bif8igt42tm83ljbc7t/46773746800.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/70750795236.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9ffd696ec---14563955655.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c064cc0c783aec2b2ab5a972e85962d0/gatuwasafa.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/fitexularetipatorata.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/86953053413.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff23ace658---fatag.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/fesawiko.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/6852096942.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45bf85d1b---23895278084.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/ditaxevezikupamupanut.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/fibudoxiwilexurosafunu.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/kukejakojopijevaxibujar.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f82719766f---ninenukexujijinagujaj.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/91870751510.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/42720275673.pdfIn PDF document text
    • https://paperland.bg/uploads/file/vowenutig.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609847020a390---96172534260.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/47385802112.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/56cda2ecd42dad36866f7b643f5619ea/13780658102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bhagavad+gita+in+english+book+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 18320 bytes
SHA-256: 8813417f2d95006dd1cad0d1ab033a772c62bdb9977dd0abbc56d8d302aeb928

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