Malicious PDF — malware analysis report

Static analysis result for SHA-256 a251f8526649431c…

MALICIOUS

PDF

75.0 KB Created: 2021-09-19 02:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 00f8719b6d45547068329d15093aa70b SHA-1: 227459785a70e358a759cd6ecd8a2dbee2fcdb44 SHA-256: a251f8526649431c50f5ac5ca92bbaa28fb8a6fd77c0d787ec914136637f9e85
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest an attempt to direct users to potentially malicious or phishing sites. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/nonigotiniwevow.pdf In PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/21512960700.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/ziwoje.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/61998802462.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/sifefenelenifelu.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/19735907915.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/nenegozerugun.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/tugudoge.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/dasagoxemipokevimese.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613866ab1b796---nabukevagixurudatovojorik.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/dipevuparusufi.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/uec0gfa52tfi846iet32481c8a/30835577932.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/10998252871.pdfIn PDF document text
    • http://www.agot.pl/upload/file/50775909884.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/jajinesisolalopelujel.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/75082793339.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/91930647800.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/73987498405.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/44962094561.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/92256171384.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/meluwowebuvu.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/jonelufarekokatasuzago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=avengers+infinity+war+4k+full+moviePDF 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_off0000bd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5D 17408 bytes
SHA-256: 61fdc8df978fc2f533326561d0c0533f8f4850e4e700abc168a2765b5106f716
font_01_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 11072 bytes
SHA-256: 32da0caf44f4fb522f7cffc1d7364235307ccb2f6cadec118d9f0231dfac1945

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