Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bde6e7b6ab7aaed…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 13:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8d665f23611c4fd9d3ead9526f678ad1 SHA-1: 49ec34c4fe50cfb508221af1e0e1e9c2b34e28bd SHA-256: 2bde6e7b6ab7aaed2e13a633d7b29154bee29daa5c26966a55b4ac143f96f904
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs and links to compromised CMS uploads, suggesting it's designed to redirect users to potentially malicious sites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=acura+integra+1998+owners+manual PDF link annotation
    • https://micsys.in/userfiles/file/povakovomana.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/jurevematulogoxaluvuk.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/manuwutanijisowewefozed.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/79052060885.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/kawuvowido.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/58636683014.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/tizogofejowetazuxilotal.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/17466379175.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/xelekitosejedikepugaruw.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ear7tlht70ec9mf0g59pak3nt6/xuwalinuvamiwufug.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d17382bd---17767321468.pdfIn PDF document text
    • http://funperm.ru/content/file/ledaxejufojiniruvaz.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea94d7afd9---9540999217.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/zefitobugenovezus.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/48322114503.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fe03rf5mc2bu59p8r7d47v1d40/limibudolawofugi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/xilozonusejapikego.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/movexagumujobiru.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba5628c46---14970399440.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/komawuvonafojoru.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ef62e38a0---2522149183.pdfIn PDF document text
    • http://lamdecal.com/Images_upload/files/mesetupovejumix.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/wulenotidekujil.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/75982855950.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3904a9c3fe7474c4f39b76c673a765cc/93405596474.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_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 11168 bytes
SHA-256: ee64664ff61a8146a7044b5884df38f1604a8d02e9a9c82e4f21524627a4ca47
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11699 18928 bytes
SHA-256: 136537e8c1b7fae693888ad267610e1d6a0263feb1e019378cea1733a64ec613

Open this report in the interactive analyzer, or submit your own file for analysis.