Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b0e6091c83a202…

MALICIOUS

PDF

84.3 KB Created: 2021-09-11 18:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1f968a7986141672cb2c9ef67315bab4 SHA-1: c8314d6d288b618551a628076aa7d3dc8791bed5 SHA-256: a2b0e6091c83a20225dfb11018124705b8600f3a3cf6102dd8fbbe00f00caa5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://studiotecnicopetrillo.eu/userfiles/files/83525135326.pdf In PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/79686724335.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/72160147733.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/tadaloxumuma.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/xatojopoj.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/61648771001.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/78176722080.pdfIn PDF document text
    • http://zbmbudomont.pl/userfiles/file/xefam.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/xamisikezi.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/puzutarefazogabir.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/20187037041.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72372044705.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/wanuze.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139e560e1d52---78421873186.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/nikuwugezapaxuguxakuf.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/ziwevefemow.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/41021886699.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7el550s293lmkfpmnnuecv0v91/70791427950.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/midikejexenategudirezovot.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/30528170165.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/99625818261.pdfIn PDF document text
    • https://2acontractor.it/images/file/69960070038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=watch+the+rise+of+skywalker+putlockerPDF 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_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 19172 bytes
SHA-256: ca173c803eb8de987381780c3e412c1c12d512509e8f28f466b92e414f0ee87e
font_01_sfnt_off000111cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CC 10856 bytes
SHA-256: 15d5f89fb1f9f97bb08ca411c10737189ee784a16cfa1a83feae0e86a2977bb1
font_02_sfnt_off00012b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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