Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e15097aeadec6ce…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 00:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0c299e193c7010127cb2b2a31a84144d SHA-1: 6cf2e581096bcf2fa6d23f036b6d04cf96cd026d SHA-256: 6e15097aeadec6cef8c9be7529721970c12e3315422e025d90f3ea08bfc60a2d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The PDF also contains numerous external URIs, many of which point to suspicious domains and are likely used to host malicious payloads or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://istanajp.com/contents/files/tigevedalelogopuv.pdf In PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/74e6ff18862ba205bf956f45a53005d9/xoliwasikofulovozet.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/29034015351.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/zejorotakanuzijeduv.pdfIn PDF document text
    • https://olterus.com/contents/files/80160992703.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/zugex.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/1463835157.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/merilujupugowutasewe.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/85144615878.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/64462409813.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/19185030632.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/4585000343.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/81005071031.pdfIn PDF document text
    • http://keramann.ru/uploads/files/10119264033.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/72283947394.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/figiribupewileraje.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/40601950595.pdfIn PDF document text
    • http://anninh247.info/upload/files/41890698724.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/2893636236.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/15157419634.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/bitotoxubivojaludure.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/detojavo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=fau+g+game+launchPDF 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_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 17072 bytes
SHA-256: f26bf6bdf3405edc571b289d9181e8f765b69ca08201cda8fa3152fec293ab5e
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 10176 bytes
SHA-256: 2004b874e5228cceefa6ff1a2067c036205de55082140b3e840919a956238427
font_02_sfnt_off0001172b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1