Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b86e7aae6b7cf2…

MALICIOUS

PDF

162.0 KB Created: 2021-09-07 02:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0dc3318b1673d81ea26864a30f882512 SHA-1: 21773e823fe6be821786abf77234b4abde79028c SHA-256: 04b86e7aae6b7cf2736405e5e41412a7eb55226863a44c4df06585ed6743adad
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://oniceh.ru/uplcv?utm_term=el+protagoras+de+platon+pdf PDF link annotation
    • https://aviatroglo.fr/IMG/file/96693948158.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/52120337583.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/67428329698.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c1e3e9d002---42479031722.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/punuratilajobo.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/73748157863.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d74707a5089ecf4c82dc28e3aaea8f40/dabinagex.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/70079144316.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/taviwijoxoxenilikam.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16113c67929571---kowofagam.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/85878363308.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/48204705861.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/a3be7639ca2f57d02fa7c5c07e36e39c/96517566793.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609223afedf0b---36275745967.pdfIn PDF document text
    • https://pmms-online.com/assets/file/34765424112.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16088861b9d121---woditoj.pdfIn PDF document text
    • https://ambalatender.com/upload/files/lomep.pdfIn PDF document text
    • http://npas.ru/pic/file/57573457852.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/vitemubafolunivuruk.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/62948188370.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/594a614c2bda4fb71954be4c1c0869b7/kuvorizil.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b31e3cea25b---rukenadafifes.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a2071022f8e---degelajazufulobazutalanub.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_off00020f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F1E 10564 bytes
SHA-256: 8972ab0c26c58b6f5c05186f2b11dfc1ab695aa14530618e888c1a0fbd202a29
font_01_sfnt_off00022728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00023f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F3A 22980 bytes
SHA-256: bc0ba8c8e183581ad577358ac875b1d7a616ca45a78a42f6a20139022edeb33c

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