Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59c7989f9e1be28…

MALICIOUS

PDF

81.4 KB Created: 2021-09-24 00:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0de07586f93d5e5935d3d448a15505ea SHA-1: 98034beac1a164ea12ec799e6c302ba0301d8eee SHA-256: e59c7989f9e1be2824250f8458de5e89d905f1c58b7c192c3876d6e893fc16b1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=space+racing+3d+mod+apk+download PDF link annotation
    • https://naveenent.com/administrator/imagetemp/file/vabizuguserome.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/pareduzolumi.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/nelagalo.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/bitozazutopivexenoz.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/16822699580.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b88b3cc2eb---50140564750.pdfIn PDF document text
    • https://agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/xokuvus.pdfIn PDF document text
    • http://petrduchek.com/files/bazefirif.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/11930462112.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/nevekawabudiwilobi.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/84596347628.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/viwebidi.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/85093941435.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/powud.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d17652f51---90350709776.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/dizuxugovoribekofewi.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/903664933.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109121957348080.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/munejazakumufojazobo.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/peretojesixakiruveg.pdfIn PDF document text
    • http://platcometals.com/images/file/giridemugepofujepodep.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_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 11016 bytes
SHA-256: fe867b1d242172336db4d81bf3889f088a176960ceb72e085cdab27805c83308
font_01_sfnt_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 18248 bytes
SHA-256: 096dc2f07752f8e441c77945c2f6ba3bb7e0cbecadb90c88e638b6eed716bd17
font_02_sfnt_off00012064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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