Malicious PDF — malware analysis report

Static analysis result for SHA-256 0124ede26940b2b1…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 13:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c840f5c8ec17006cf4ee05f664c67546 SHA-1: c61cfea1095b2b4b5175a65b5ba1f86a68b6e396 SHA-256: 0124ede26940b2b1753c001dc8e8f688bb0ce5cb62e31cfb30eb1ac7487a3985
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure itself is indicative of a link farm designed to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://chanakyaaerospacedefence.com/userfiles/file/vokaligixupurex.pdf In PDF document text
    • http://andlupa.com/userfiles/file/2518285819.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/jasonoteninafazumaf.pdfIn PDF document text
    • http://arablift.net/userfiles/file/31726440514.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/megiwufasuveg.pdfIn PDF document text
    • http://churchillreunion.com/clients/72216/File/27498355666.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rre2dqp7fds9md1fkih4fdeokc/40153352363.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c362bcd96---3551006300.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/webolelujejipixiw.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bdf61662---52512593854.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/59133312543.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/vexivezozunemonufoter.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/76813816065.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/xudarawi.pdfIn PDF document text
    • http://shimoltd.ru/images/file/22583906130.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d052a30cb9---paluxivan.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/pezalilimisikozaxa.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/jejorezipifetodezejoruzef.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609db16cd1255---69940172522.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/10935800031.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/munafamapikorera.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/cb25c2bef604072e7b4f878ae2e4ea4e/95166149175.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/42732392592.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/xakominubekusada.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/julisesojidivotavalasenel.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/pibokawa.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/62191833924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=rain+harvesting+pdf+filePDF 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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 10768 bytes
SHA-256: f564c0d1202310ec74a64d4f9190539e27b2a9306277bc69dcf22a1bd915cc02
font_01_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 16596 bytes
SHA-256: 089c8d6788f9d32cf89a839eb6673214da0fec98af8450d4fda3d75353acde04
font_02_sfnt_off00011f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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