Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89d59e299007b85…

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 05:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85120a8e7ca8333ea7465de4ceb1fa03 SHA-1: 671140a01af0d61da971ca66e27f8e8e9d9abbbc SHA-256: f89d59e299007b852545954fc5e0f6a7a5ffa5a9553cb27c9735e5b72bdda78b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings indicate the presence of external URIs and a link farm, suggesting the PDF's purpose is to redirect users to potentially malicious websites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.naturhalles.fr/fckeditor/userfiles/file/gerifivebavawibafefu.pdf In PDF document text
    • http://systemsbiology.at/uploads/assets/file/76952518213.pdfIn PDF document text
    • https://ivanamihic.com/files/vejenoz.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/97848918037.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/bomabimonaxusodamivikewa.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/41979115349.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/fumafasizidedenexakifa.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/23838067166.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/49099616082.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/99581890501.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/pozigobefegazojixisuzoj.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/95679714822.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/13284491998.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/34293317075.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0dc2944c42992f863163672c494a0e55/68808848019.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/80447496933.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/pukuvopipuzogefemewafazig.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/xuzetibuwumulip.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/mozateseda.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/jugutetozexe.pdfIn PDF document text
    • https://ms02bet.net/contents/files/98373609959.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161372badb42fd---mubovegip.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-2/20210902094949383620.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/jevekovumilaneb.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/7720940265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=jake+paul+fight+livePDF 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_off0000da08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 18148 bytes
SHA-256: 44846a2c44881e7c7af0ba024997bf68a615680383b5bf50b36e465ed9d1aac8
font_02_sfnt_off0001210a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210A 10392 bytes
SHA-256: c8ecac639b8b71e6551e106856ec502f89548c012e72cc2890fe9fc1475cc050