Malicious PDF — malware analysis report

Static analysis result for SHA-256 9409ede89de08ce4…

MALICIOUS

PDF

72.3 KB Created: 2021-09-20 01:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b95cbf2f3643248ba62364621e4c9c62 SHA-1: 22a0c1edff56b2dfe91a0d5acbe6aeb6245b1182 SHA-256: 9409ede89de08ce44c8c3528474eec658b381a147f7ac735c77a428fbc390110
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://poexali.org/static/image/_u/system/files/22154275205.pdf In PDF document text
    • http://bfttacg.marketsearching.com/upload/files/vugus.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109162119128268.pdfIn PDF document text
    • http://nprofit.hk/userfiles/suveletefiditesiw.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/fobifetatisenapidefa.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/bonozipemidubazaduto.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135950049dc4---beviloxisodagam.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/94516623218.pdfIn PDF document text
    • https://armenia4d.com/contents/files/mukagus.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/fugikovu.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/42575854371.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/9488355101.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/079df1d07118de4496e2cf8c6aa8574b/pevitomeje.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/48559870131.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/besajixeguberokoba.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161364058afc37---67085077739.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/lerizu.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/notukep.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/47685622464.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/97561164791.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/40967330097.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4e1a20bb---dudomipa.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/futifosur.pdfIn PDF document text
    • http://inistor.com/ufiles/files/mukubewomedaxiwumipowakom.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/pijitobavogoz.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/77918771858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=desactivar+modo+seguro+samsungPDF 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_off0000ba7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7C 16280 bytes
SHA-256: e9c0f042d5e5e276aa32cd65ef104987b9f3ace311ca3b6ffd924d66233ea21d
font_01_sfnt_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 10832 bytes
SHA-256: cfa7067b00ccf0cdbae88a85ca29235a0a6f9d5e2d2366cfb757ab58321e7df7

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