Malicious PDF — malware analysis report

Static analysis result for SHA-256 068a01de2b86a0f7…

MALICIOUS

PDF

75.4 KB Created: 2021-03-18 00:20:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9bfe43b05a8af28afebb508a2dd0689d SHA-1: ed9737387041b852ab74f64f20ee9f62c5a14be6 SHA-256: 068a01de2b86a0f78690ff9454948e5d81b67e1613e33af01e1c0ed85783a2dd
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/strik?utm_term=how+much+is+express+international+mail PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476007/normal_6028172a3d7c4.pdfIn PDF document text
    • http://kindraretterath.com/90861974030uc86c.pdfIn PDF document text
    • http://daravto18.ru/how_to_combine_like_terms_to_simplify_expressionlnozg.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/gloomhaven_scenario_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/IhcdidV/advertising_agency_las_vegas_nv.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/juzasinilubasubilotad158r8.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/2HYhaCv/lumber_yard_in_iowa_falls_ia.pdfIn PDF document text
    • http://trokot-online.xyz/eanm_guidelines_bonez7id1.pdfIn PDF document text
    • http://doctorzlo.com/biblia_del_ministro_reina_valera_1960_gratis3vp09.pdfIn PDF document text
    • http://bigswinner.space/microsoft_sql_server_express_offlinepg7ww.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ff67fe0841b0.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/jifhijO/leap_day_meaning_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/I0gdYhg/vatusilipewukuf.pdfIn PDF document text
    • http://clebohets.xyz/1966_cobra_super_snake_for_salehzud7.pdfIn PDF document text
    • http://kudretbozaci.com/eleven_rack_editor_will_not_open_mac24281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/jirunakoriwutibunusu.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/nukadabefopiberavorefemej.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/convert_cdf_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/negaraz.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/cavachon_dog_breed_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/winafedogezegariwo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 5296 bytes
SHA-256: bfc869d5cf7987a5a44ee3cb97d16dc7138ea8578ac9a45fa78c9803099102d5
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 10772 bytes
SHA-256: 01a68ef25e5c03638ff5e5b071ee814d4517ad76107d37ac2b9d2d1be8e18835

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