Malicious PDF — malware analysis report

Static analysis result for SHA-256 06acf92828d2a69d…

MALICIOUS

PDF

86.6 KB Created: 2021-09-23 18:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b180727f19116c07bf6c41c1b52e2da SHA-1: 2b7d64172cdbcca7232cd22bb330df3ec6995120 SHA-256: 06acf92828d2a69d5b35ef028480ca62791854a9dd04b48930ffeb2e07b4e045
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and external URIs. The embedded JavaScript likely facilitates the redirection to malicious URLs, a common tactic for phishing or malware delivery. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/xeripanavulalonumevopu.pdf In PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/sajozizexe.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/zanexabesedokofipusiw.pdfIn PDF document text
    • http://hmed.vn/upload/files/makub.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210906032722.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/38400377451.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/67499976886.pdfIn PDF document text
    • http://gapp.fr/medias/files/ridebazesid.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/71301599672.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/87736967678.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/jezojamiwefasiratotukip.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/dudolaxareg.pdfIn PDF document text
    • https://solturism.ro/images/file/13783148765.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/wikoxatixajejiketudiz.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/dukif.pdfIn PDF document text
    • http://proxima-design.cz/files/file/rupufadejenadaranovi.pdfIn PDF document text
    • http://lobi.md/userfiles/file/lufobaf.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f37787f520---1310302568.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5rvvncnhhq53nv5r3n915c90o7/xazegutuwodad.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210909_21A7DDDEC77F8FA3.pdfIn PDF document text
    • http://gtshotel.it/images/file/pemixududimizimovi.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/50947455390.pdfIn PDF document text
    • http://a-pluset.com/userfiles/peduzugotuwabalakiwi.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/gobesifodomiberev.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/49242141981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fzmovies+hollywood+2021+moviesPDF 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_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 19128 bytes
SHA-256: 3b6b5adaf7d09a9d8b3d3fbc3d6619bb9048186e623d824497aa7bcc96532e4a
font_02_sfnt_off0001346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346D 10648 bytes
SHA-256: 6cba7fc13faa492d31764c2f90a7878c30448dab6c1ba079a38454a62277ddbb