Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2945e3145dd4955…

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 00:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 7e8e6ccef66c7d13749a906bf0950197 SHA-1: 244fab06f3232a003e38d0aa27f28712bad806bc SHA-256: e2945e3145dd49557235f3c10829037ecc644549d1c8327b4f9c893ae4a76979
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://bolt-go77.com/fckeditor/userfiles/file/xadediloxusobifudakirer.pdf In PDF document text
    • http://perevodvnegiloifond.ru/pict/file/85798562522.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/86459343767.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/71694622108.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/24442385675.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72354722027.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/51372462953.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/34889013477.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/36968631424.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/95406614789.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210912051356709275ykah1m58l04w.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffa4a38e3c2a51c10b5e5ae26080dfd9/99005416647.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/bugunusefe.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/28477354525.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/wewilixibozusofifatono.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139f676be4aa---nijesose.pdfIn PDF document text
    • http://ximangsongthao.com/app/webroot/uploads/files/jufawudiwase.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/wadiguwikabavu.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/xatokaberixudikop.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/kavekukisiwodolewaj.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/kufipuweferaso.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/toweve.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/saxiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sample+report+on+communication+skillsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 17176 bytes
SHA-256: bc55f2b6de21c01f3b2a948f933c4147b1d3cd8c3fbe9fcc10181409a4da8313
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 10800 bytes
SHA-256: 085c105f829269a1599e63bc7ec8f7b510b2705c7a0769cb0fe183ec12eced03
font_02_sfnt_off000120f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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