Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6ac3a0abf9003b…

MALICIOUS

PDF

81.5 KB Created: 2021-06-14 19:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5b9b6f29d7ca34e6133192ee902a65d1 SHA-1: 5deb3cde56e413f06b50d20a1c2858c31b3f59b3 SHA-256: 8e6ac3a0abf9003bbaac1b86a1970a48361c4ef609bf46fa133f6c664c944f70
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document is classified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The document employs social engineering tactics, specifically a 'ClickFix' lure and a password-protected archive pretext, to trick users into executing commands or handling encrypted payloads. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a downloader or part of a phishing campaign. The embedded URLs and the document's content, which mentions 'wifi password hack', strongly suggest an attempt to lure users into downloading and executing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ketchas.ru/uplcv?utm_term=any+wifi+password+hack+pc PDF link annotation
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e0410c7331dff062dae19ad59ef78361/36766167791.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/hsf2hkf9bvanms7u4l693o13os/vezaludawazuxizuzo.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e97dd298ac---kisasudedi.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/josawupuxazifofaj.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a905a1eabcb---gesilalu.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8f7aa59e---nejubexusosod.pdfIn PDF document text
    • http://altinay-law.com/images/file/ralumiwisupapemefa.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3550b75edaf1069b48ab3b597c0e0795/61615435706.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/76881022869.pdfIn PDF document text
    • http://topas.lt/userfiles/file/72045938324.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/33785052470.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/devenodefinofopelep.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210612_3AB16C16D3EDA1DC.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/0h9k3qmuc2bjtrsjsv6tj4i8ro/dadorozasosire.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/poxamugoxopib.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b92317bdf7f0df8800b4a5eae7b6493d/25731392935.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/xigefikoxofifu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609024d25461a---gosubujesogobaraxi.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078579a5c7e3---puvixigobafenutefi.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/96138028149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5048 bytes
SHA-256: 73e87032e6118715cfd37d02f8a83b47a99fda0df7d78bcd5ddc4bbe1fdf995e
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 22380 bytes
SHA-256: c807985ca77d605229ef06d476704da5d59ea052651633806d9600b3c1d0b4c0
font_02_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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