Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e9db60d92d3c27…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 10:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 20222ffc1d3c859b972df914dc3b0d2a SHA-1: e78c997a9987fd8aaa695678c52b2674c1703fbe SHA-256: f0e9db60d92d3c27a40db216f6c1015124957660e81579d11888c9040a5433b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of link farms hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful content. The presence of external URIs and the overall structure suggest it's designed to lure users to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://laborke.ru/uplcv?utm_term=what+is+the+best+gun+on+call+of+duty+mobile PDF link annotation
    • http://sb-78.ru/files/file/67615903855.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/82162736784.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/21467856357.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/taruxole.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16140e96fe4864---fopurejomuwojex.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/minubafowugize.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/544418590.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/40d074842d620fcd7e6fff7d91dab45b.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/64853272745.pdfIn PDF document text
    • https://empresa-venta.hr/files/biwopodudafetifuma.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/58571799058.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/82443675218.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/lunigekilefidalapa.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/daliparipaj.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/19330967593.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/056799126c60713cdba3f9afdaab12d7/80334262385.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/bibaxewopol.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/56223176286.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/46051394069.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/jizexugunuxilofepev.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/54666553174.pdfIn PDF document text
    • 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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 11172 bytes
SHA-256: 72c01528748d3d0613d41799193401b9a1a1f98ef1756ce47a83b37eeb28218f
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 17368 bytes
SHA-256: d0cc25fd6ebb18fde549180958494a3430e0a9bdde46260354e0ad8ddfdd4fba
font_02_sfnt_off00012610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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