Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e973960796a26b…

MALICIOUS

PDF

71.2 KB Created: 2021-06-08 03:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3694e094ad609c77579c64c5d1c7c903 SHA-1: 0b5e0f5c8a6eae6485c31408bb5cdcab149e70a0 SHA-256: 30e973960796a26b8b7f5f75f1ff37e8c7b8a73349bd7996f81f949f6e088109
156 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ketchas.ru/uplcv?utm_term=libro+de+quimica+2+bachillerato+2019+resuelto
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/do35vbkgfaklnfibn8h68jhgev/17232521707.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ic1h4hgefavhke81dtpcvobet3/71463647409.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774102dbc6a---62655492501.pdf
    • http://alexandraharris.com/clients/36054/File/59669269872.pdf
    • http://foto-klub.dk/userfiles/file/46511639142.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/kewubetexuwij.pdf
    • http://activesolutionelectric.com/images/file/44195138445.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc95feb2934---ginuvovi.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/47289639097.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed605d2ff---wikipuxomefoligixaber.pdf
    • http://talleresjpg.es/img/file/gonemopirifewonigiruwu.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/dip4kjqiopmbsg6i3100ibofrc/waxireporeterowet.pdf
    • https://agermag.ro/mm/file/60260348657.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/d734sgqtbai87m146noobgusba/totimitaleme.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e7457fbce00c7f9c6934681d69b41593/pibexipolumaborit.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab86a525f4c---67639463353.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cf.bin
2bb3c88af2d911d819f398c30f19f50608203812279dfb224f26b35385d7dd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CF 5868 bytes
font_01_sfnt_off0000e795.bin
f816f5362fb2c1655ec2e0cb71750b5d1e24627fbf5a756dd87092ed03324f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 11844 bytes

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