Malicious PDF — malware analysis report

Static analysis result for SHA-256 47db7ac7fd82e42b…

MALICIOUS

PDF

76.2 KB Created: 2021-08-12 23:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a0c38271db2b037eb5a9e3183d23c1bf SHA-1: c93659102a2be5c5e7d89044820c5ac7669f9efb SHA-256: 47db7ac7fd82e42b005c86a0398293e1fbd3c5bf8ddaf23caa5cd1869d05b258
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content through a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://rugsinc.in/UserFiles/files/5197781571.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a59e16276---61438751115.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/85584294344.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qvsav3nol5d6oq0qgl4akla3g4/39085915447.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f9efae75fa56d68b1865a812a15905ea/geruwosetovusuxipukuku.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/rubanitenebetizamaseje.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/14397896133.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/vb590ltqt00mlavlilrhsm08e1/96149537293.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/b06178826bd61e125fc57714f5824ad5/42506686464.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/07041937f1fa38ecdfd57de2c7c577e9/83058399972.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/sareroj.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606da258402f5---77089379367.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021080611460773499.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/0f00505b0a586a42d80751269358e9c7/82528205160.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160926bb767793---kovep.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110f278a2801---37449057357.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/xilaxegimufode.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/17775522194.pdfIn PDF document text
    • http://skncn.com/u/files/bojiviwawenaxopugizojetof.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cabda9689---gaporaz.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/lugibiwadutiro.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dae25a38a5---29238530220.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/zapiwawezafubisud.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/febasimopazebofubibaxipeg.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c063052109---81417776964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jbl+harman+tws4+price+in+pakistanPDF 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_off0000c58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 16704 bytes
SHA-256: c161e1035d1efa89956aec892387bbe81b9c1444f2942a6c883b8f151014f2ac
font_02_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 10904 bytes
SHA-256: 19a00a351ce4e1975b319ecee4c3e0c0d303992a390df63b2f9bc848f9ece377