Malicious PDF — malware analysis report

Static analysis result for SHA-256 3035fe30555bf089…

MALICIOUS

PDF

92.0 KB Created: 2021-08-18 19:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3a30f71a09c8fe094881d12e71432431 SHA-1: b25ed8eda19fa3e30765ac7c581ac52420260599 SHA-256: 3035fe30555bf089110a1a773e006d208a77f8ec50ce87f478d1842019a05aad
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, a common tactic for distributing phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and the nature of the URLs suggest it's designed to lure users to malicious sites, likely as part of a phishing campaign or to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://panegovernance.com/ourprojects/chowki/UserFiles/file/borodisikamikoku.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kbpkdhk2koenbnqb5rj70qbd66/safuf.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8969451a6---vomusuwepuwitebusexujumis.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a45e2ee64d457849953c62801a637482/69135730084.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/33735158875.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/15c3f9e960820716ec024efa965ce2bc/pulas.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/xogexenutite.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/sumefu.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/35755812922.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/jorizurezukezipodonowixi.pdfIn PDF document text
    • http://cloverdiamond.com/file/73708602523.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/damapenajurojufudaz.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/gorakazulafunafabaza.pdfIn PDF document text
    • https://ms01bet.net/contents//files/puzerodukamixezesas.pdfIn PDF document text
    • http://cristalensi.com/public/File/wevijavovufatem.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/a93599e7c60ca91677526ee2514367e7/36838499615.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/a8fe33d66fcafac1d66ba7003c3b69fb/lifunadamuguxe.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2e05458159a122f0f12e972372a935b3/87097553346.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a529b2a097c---xusoxanijimog.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62e89876bf---34773734014.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/vatij.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6e97b148aefe13b694b6818f6786671f/16893462658.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607961c235789---vajuzolugag.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/844946143.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94dcda0813---xebiwesoxoguborawavoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=print+handwriting+practice+sheets+for+adultsPDF 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_off000103d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D9 17192 bytes
SHA-256: bc83be5ced7a23ad721d997117f4c311254a7c9ac1ba18339f8095e16044583a
font_01_sfnt_off0001308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A5 11088 bytes
SHA-256: 55639f88603485bfa0cd6283007f4ec054b5d1d954688abfb3144d4999c8eacd

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