Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee510120173e22f3…

MALICIOUS

PDF

74.6 KB Created: 2021-09-15 17:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 35a591d265da51f342d071ed00f16c58 SHA-1: 679f5a28aa0284c891ad8330a4f1013fd0eeb6c5 SHA-256: ee510120173e22f3f05d2ce92a11c7e04008812ddc577861f1e0196d68d18887
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The file's structure and the nature of the URLs point towards an attempt to exploit user trust by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=streaming+avengers+civil+war PDF link annotation
    • http://chaitraglaze.com/uploads/67161406974.pdfIn PDF document text
    • https://ever-progress.com/upload/files/wuretowifivewubo.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/a6f47ba46c1c29e339cc53f023ed9b02/kodazubixasiwuwavop.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/vititifofalovoxiremoraguv.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3dbd8622a96bd5518fac991e8da9f04b/zosugijidonefosesaregam.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/22186353830.pdfIn PDF document text
    • http://jawarakreasi.com/file/26048941734.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/wesiju.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210903155523.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/35961211540.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/55635695832.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16133a80031e96---74445733239.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/zipusonaxetibes.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/007862ca8e76df620822885bf04b0101/nivesubodozazowu.pdfIn PDF document text
    • http://mq-water.net/upload/duguxisabolaxewufozodij.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/labivarekuzus.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/rexizujeraf.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/xuwel.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/65577488117.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/61417802281.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/vusawafafafukepen.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/voxetonozibaf.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/62554258043.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630562413/files/32396047922.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_off0000be3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3F 17736 bytes
SHA-256: e3b49384d397a87c689c68d5e51df08e4eb9a58564b8714c75d40d67b41104b0
font_01_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10680 bytes
SHA-256: cb4a6cac27612fb28a1180e2a05ddce673db4fd1cd6ca72fe2c091c3aa596839
font_02_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1