Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb787e2090c1e7b8…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 19:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0e26f580766ed89535394c3e7a904d09 SHA-1: ae1aff99e3d5d489e5e5ec1433883f52564bee1c SHA-256: bb787e2090c1e7b80fed37892a657da2385c78f6b31d84ac80cee5ff733f240e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The heuristics suggest the document is designed to lead users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6523

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://catamma.ru/uplcv?utm_term=2009+hyundai+sonata+gls+owners+manual PDF link annotation
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab15500575---22881365879.pdfIn PDF document text
    • http://ponyomaru.com/files/files/47779700572.pdfIn PDF document text
    • http://www.celso.org/download/tugaxidodok.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dta8ppo438jpue33qmgtkrt0ao/67220600492.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/5a164a53dc3b7129dc6f7396dc78e597/86548470810.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2085169fff4e9f321ba3f7b010899e38/vilefibazagizozubig.pdfIn PDF document text
    • http://didopack.com/files/65088894599.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cc6659faf9eea11bbb3a35525b805a78/kesugerisusetaranelef.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/041dca7f4b754a8d67cd3eab2515ab9d/vuvefibi.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/mebifezipe.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe72879bbb---8020118999.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/32195207388.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/9704dea8ebe8828ba53d4362c4741f62/nubigenuru.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/37951070806.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/totarupuw.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/98693027061.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23128368d---83190670621.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f498bdf761b2288bc664e7a3dec5c2d0/kigenes.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/nutupinakukako.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/zopasekor.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/sejigegopiluwunuruvuti.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_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 18332 bytes
SHA-256: ed47e99e8acba9e761376138cfb0804081944b62418d5cc30fae6b6aa9f7bf3a
font_01_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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