Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d9396ea6a8ae80…

MALICIOUS

PDF

69.3 KB Created: 2021-09-02 19:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9486118a36a58d4ad6db9a4da497416a SHA-1: dfcbddc718762261245b42148a4e36a60a546699 SHA-256: f2d9396ea6a8ae80e1cc1d0356e5dd3d3b06859d1d6e3fbbf67f4c135d317ffd
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. This structure is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/pmbphfmvhbrmd9j2005umevb7p/lusedufugusa.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4e101922fa425d547d0f37b1ad4d9551/beboxumuwosikuvab.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/vusemorujozefaso.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/22555680035.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/revujubivizetitifetuj.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///45811290258.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a16378a83---15140875767.pdfIn PDF document text
    • https://eklyps.net/images/file/35815346607.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/2728ca7bf271ade46488871ca2b0111b/70706378631.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/sorutulovotega.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607450ae3b23a---pewibovam.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/53240670254.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904a5525b27---25124333825.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/mapidatas.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/77168922181.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edf8c08295d---85256806957.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/b90836bb4ad065d63d7c50e8e8611a64/mewomipugasonel.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/0fu5m4tg1grmkf96rfbuv88ilg/14989199708.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/zanesepemevuwapepugute.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/nc3v9hgjue79b62h8a3s6uf26f/nabuvobilutuwa.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/16538e377c0d1521ae1efcf56ba00bd2/87506757819.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/907a5613aa2ed892c0bd35f6bde84aea/39910945741.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/jaburepasavokutadaxiwexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cvc+word+list+with+pictures+pdfPDF link annotation
    • 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_off0000c2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E3 16388 bytes
SHA-256: 4418d8a9b8c2404713d58d2b39ab51fb731975005555004458952ed6e87f996d
font_01_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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