Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65d674d2ac37062…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 12:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b6175353e60bff995c0f5eb17347544 SHA-1: a395c28ed76973539c58e3df81dd9caf3d246f9a SHA-256: e65d674d2ac37062c01e16af6975b3ecf5f0994e23baa8e7a28de6d1809c4dc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious, specifically identified as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious or phishing pages. The presence of embedded URLs and the nature of the heuristics point towards an attempt to distribute malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://crysiq.ru/uplcv?utm_term=belly+fat+acupressure+points
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bf63f7d4532---64211826893.pdf
    • http://pnmanagementsolutions.in/uploads/deropezekej.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7f5382ab---lenutojalerutamu.pdf
    • https://saam.vn/images/content/file/zudalaz.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16096066b7113e---lokurizunipudufozi.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/10fbbbe25184bdab67153e59a4750f30/9497903837.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077795c73840---jazap.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16081f835b8674---minufoso.pdf
    • http://gramercygrand.ru/files/file/70002256666.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/39d6451e7215297207724f13504c0202/91265174529.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/57891208203.pdf
    • http://au-coeur-du-temps.com/userfiles/file/39083834129.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/738chmbua0c3mj25jcn348b7kl/lepozufimikonavisepim.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609843ed9a3d4---binapezowetedulekora.pdf
    • http://georgefamilyreunion.org/clients/86186/File/fopijujone.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16078feb673fd3---fuxemexuwogalefibijavo.pdf
    • http://thangmayedex.com/webroot/img/files/64795872429.pdf
    • https://addsfly.com/userfiles/file/59447478735.pdf
    • http://emmanuelmissionarybaptist.com/clients/74938/File/rutujodasotibopinif.pdf
    • https://nnt52.ru/userfiles/file/48504001445.pdf
    • http://inse.us/uploads/images//files/zirobeze.pdf
    • https://nikoljski.com/ckfinder/userfiles/files/40478612440.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea43.bin
20c81d2e0f7868d99c0fda8c48a627fe868ca8c416dc85ff6f4eebccd7637313
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 16936 bytes
font_01_sfnt_off00011639.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 16792 bytes
font_02_sfnt_off00012e50.bin
f32ae235d5c668283f143910897bd8ac42a694020684d9b37e322e50df3a540e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E50 10740 bytes