Malicious PDF — malware analysis report

Static analysis result for SHA-256 014879eb2ef4f492…

MALICIOUS

PDF

91.3 KB Created: 2021-06-26 15:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5a82db7e1261abe82c1fe5244717df32 SHA-1: 20ad41a43333427c333fa3bf4e2538d259d443c1 SHA-256: 014879eb2ef4f4929b387c46997a386955bfe43701f62398bac9bb6d3bd27a1e
196 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, a common tactic for executing downloaded payloads. Several URLs were extracted, some pointing to compromised CMS upload directories, suggesting a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://majorsagilekvaros.hu/uploads/file/wajomewafakiwudulug.pdf In PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04c0c268f6---23382778228.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/27558888581.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210621_84260D632DE73AC7.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/1698d60a0ced6c67f7e72278a2067a8e/tapulinudakagigitizub.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/laziwe.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/59956598389.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ec0afc4aaa0490aec7c052c242b60458/batisananag.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609682dd3f77e---mazeno.pdfIn PDF document text
    • http://apcmagon.com/userfiles/jilonidoboxa.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/94725595152.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2b1e9c54e---labixuputij.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/92718a8f2a6b7b2b7dfd363b7845cd67/54011701561.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/71404132762.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/pilebemexob.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a10144025a937584e575c63bc84bd1ef/40968348423.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/21136839d8c6632edf2dd39e2abb7f6d/8488153835.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/52284420824.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/59074455523.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b485b05f517---2146458723.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/bizosixexawoxofur.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/fd97421e2c66c8aed9146f3fac98e23b/11771211577.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703f3e7bdc5---jiletafegiwogad.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5ea9748bbbb3f77e54be6ba16ea06619/garenegudemoxoranesame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+push+new+branch+in+gitPDF 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_off0000fdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E3 18380 bytes
SHA-256: 35594b399cf8cb333b55ab97bbaffd45b7210f463d98dc289fec24173d3b9db4
font_02_sfnt_off000146ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BA 10924 bytes
SHA-256: 2c50f45e94d2f77227274ef8360f56639452ccbf4c7d4b90fef752eca63919a0

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