Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b076065b5ddb7da…

MALICIOUS

PDF

88.3 KB Created: 2021-07-23 20:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0aab5607b0b5b5bf49430ae37ce0c14 SHA-1: 95f3822816e8dd2f2a57f6548d1572d8d6efe578 SHA-256: 2b076065b5ddb7da0b955a71549f18b3c8fdbe923f47771cae279bf91917b363
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • 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 http://bajcsidavidfoto.com/_user/file/72413527972.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/99ee39b06ffd2942273446ba98abc34c/118172693.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/6b040330133b45efafc2a9c84e164c2a/kupejajex.pdfIn PDF document text
    • http://brunsfamilyreunion.org/clients/e/e7/e70b0594429ddd28dfd4dd2f61c76e80/File/78745210429.pdfIn PDF document text
    • http://dothi.info/images/files/19275450545.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/xekewisolu.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/depuwafajij.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b62c65a4f---94373199350.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/qgjqpc0n0cp9dtk5omq2plf653/sigugozimapidovatetulafin.pdfIn PDF document text
    • http://mesterek.net/tmp/86693136917.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/lkac8lh5t81hhgc0n40pmnfgok/wodujibewoxanixokigo.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bee60a57b---kumivenivifuzi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5bef9a4f3---zimine.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/30908568803.pdfIn PDF document text
    • https://seikico.net/img-tym/files/62406583870.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/48709064549.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/likuxuwovezogikikite.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/dcd58548b6e68e36fdeec7900e82e482/sudojugugitakuza.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f283332ccdb---39810879191.pdfIn PDF document text
    • http://ore-processing.ru/d/files/radotiwifezofovak.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8b4088be0---19426287720.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/925243226e31a70864f8ad12789b01f6/zinixaxudegalegamuduwuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fast+and+furious+2+full+movie+in+hindi+download+khatrimazaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 17256 bytes
SHA-256: fb3128feddcbd0c1455b0b4e1044dce9ff1328a0ff08701d6f01fa4f70e7eaaa
font_01_sfnt_off00011ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BB 11120 bytes
SHA-256: 8c7d3d63514912cd5d113c84258e8e4902a80e56a6d4f93a25516741f95e6812

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