Malicious PDF — malware analysis report

Static analysis result for SHA-256 75761f1af954a60e…

MALICIOUS

PDF

81.8 KB Created: 2021-08-01 17:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 875ebcf1c217850c8060e27335e6222c SHA-1: 9697727ce63e408f813c19017b14ac25ac648601 SHA-256: 75761f1af954a60ee6b77444a0ef56f7abfcf0103ba5561a97bbad5d6af15cb5
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9080

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://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a0a286b97---jinipimamaralotujaxavos.pdf In PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/40891915789.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/36159561901.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/tosekifugikizefupuri.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/sudozis.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/157825c632893c8daa2a151c7114c4f5/furajebijovuvunoromud.pdfIn PDF document text
    • http://nktrading.qa/file/files/44964777974.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1044f12d49eed858fe32ce2aee907fc/fitageza.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///60947001908.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/44510346e68336f643607c88d86e33aa/bitodaves.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/nogilezixedik.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2812d2caaf---nifidovuvuzasilexi.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/nebototafuxirovobomudi.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/84675025048.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/memikabatulutavirejiki.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/13829ea628e7813a8aac5d3ec7595274/jewizefebawajixewa.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/6299896119.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/91892802271.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/64455535741.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/tebonupo.pdfIn PDF document text
    • https://bataretak.com/img/files/file/gezutagufetex.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/vozimuv.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/vimokodajijukakizefik.pdfIn PDF document text
    • https://promise-land.com/upload/file/zupisazuvosugene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=problemas+de+fisica+estatica+resueltos+pdfPDF link annotation
    • 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_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 19256 bytes
SHA-256: b87bbf51fc45938e1e746d2af5f38423112fe003d3677fe373d98c77098d51ec
font_02_sfnt_off00013223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13223 10920 bytes
SHA-256: 59065ba29252bdf1b328acaf54c28a650bbd2864eb37fcccda4825e5d3e7be3f

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