Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e641e478f5263e…

MALICIOUS

PDF

74.6 KB Created: 2021-09-01 21:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6bbe5246fde2d30687ab37bed5878ee3 SHA-1: 26e9a93c834622e2ef08e7d4af8b3601df1bc2dc SHA-256: 41e641e478f5263e7e6657c72ebc2708a7c72184f1b3c983a29e2d2eb40ebda2
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, some pointing to compromised WordPress upload storage. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick the user into installing malicious software disguised as a browser update or extension. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lacecinella.com/writable/public/userfiles/file/91152326069.pdf In PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ob9fdrefbmqkm358eps507j5aa/gegumomaxiwerezotimi.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/64521491594.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/66387839887.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/voxebewisetimovunegafisi.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/41749981920.pdfIn PDF document text
    • https://bak.vn/upload/files/99260898514.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/u3pbebeu4lcltfbu7cg16309kr/93819045720.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/49584647554.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/xedulekese.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea638d502---pejefewowegujerowiw.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e4b86f521---24184756040.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e881432624e0056a16423cb352bfffb/22435610080.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609130f1a256c---biremopijerepuxakuzib.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c69c083563---87194595561.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119468d7ff7e---vefujavezavutowuzamewafag.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610fc3af78764---zefagoxerub.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/8jlrt5lntoup3n77193qva2de5/49374000992.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/21558662186.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/20354168404.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160953b4e011d8---7918429533.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/navudikelijumusi.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/8228834557.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/tixozedomagibovisudepadek.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c972aed1b885e4984876b953e835d010/jatubojabifiwikawalu.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kuvejemisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=introductory+circuit+analysis+10th+edition+solution+manual+pdfPDF 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_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 14992 bytes
SHA-256: fd78e142ea2b11c53660fce4f63cc2b2e5ac7db3e00a98ad9935869117e3c0de
font_02_sfnt_off00010100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10100 11224 bytes
SHA-256: cf1871fbec68ea5e8facc62d3ccdaa6be654020e436dd3094cebee0fd918d87c

Open this report in the interactive analyzer, or submit your own file for analysis.