Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e24846892a4cb6…

MALICIOUS

PDF

70.3 KB Created: 2021-09-27 06:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 91ae82133860ead7b0774e00e3bd5893 SHA-1: 6b8581d2091b06a300490fb2d41d1c6753b65ddb SHA-256: 06e24846892a4cb622a53c1bf7bb06e988756787e3726acbdd1e22f207328825
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a link farm designed to redirect users to malicious content. The document body is unreadable, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://inwebjor.ru/uplcv?utm_term=ethical+consideration+in+conducting+research PDF link annotation
    • https://safetypadlocks.eu/eurostyl/photos/file/toxuz.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/mifazogi.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/59231499560.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a21b5fd711654fbc2521581080ef1337/bumesotamiwudosilom.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149239de570e---satufojagikilitemeg.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2q7tgmqa41p908epr1baav7mqm/gogugepugezofuv.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/232016381410.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/jibupamid.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/47106481946.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/pisisunepumovonat.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/xewajatoxarafififotow.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6e3966e82bc74b93973315c54b044d86/95761351500.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/71394647006.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/zuxanob.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/mebar.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/tolot.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/51076828804.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/naxaforu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b534f1db80---52581859291.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/95634346716.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/53951556635.pdfIn PDF document text
    • http://kes.org/upload/editor/files/21334608993.pdfIn 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://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_off0000b075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB075 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC887 16808 bytes
SHA-256: c27c1bcf6fe30d405d7fbe298dcf061a8d527e8e5fd3bf8c6d1c55ba51bf834f
font_02_sfnt_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 10732 bytes
SHA-256: c20ea0a44303d6fa87672b632ac79dfceebf1d6df41e89e988cb20e6445d7de3

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