Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07ee3944670811f…

MALICIOUS

PDF

76.4 KB Created: 2021-04-25 09:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5b2816b505736a990e6dd2125deb73ba SHA-1: 05607fc216f11654b8019bdf331e0fe06e85de13 SHA-256: e07ee3944670811f3c491d231b23d6317d68b1a5f45db96895bce5911c3d8348
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous embedded URLs that lead to link farms hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farm characteristics strongly points towards a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=think+of+mein+song+download PDF link annotation
    • http://rasipafus.getenjoyment.net/blood_relation_question_download.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/records_of_declaration_disbursements_division_portland_me.pdfIn PDF document text
    • http://novuzigekisev.iblogger.org/kanal2_reporter_saatejuhid.pdfIn PDF document text
    • http://ig-mediateam.net/32523394896i6ywd.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/iijgiGc/jejodewagatolanix.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/afk_arena_peaks_of_time_5_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kasigabuzu/zicBkic/arquitectura_de_computadoras_tanenbaum.pdfIn PDF document text
    • https://cdn.sqhk.co/wotabefej/irhc3rV/55069932374.pdfIn PDF document text
    • http://wowurilagufa.iblogger.org/pocket_juice_charger_2000mah_instructions.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/pdf_file_reducer.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/amadeus_screenplay.pdfIn PDF document text
    • http://merishwheelrecords.com/40010582983bicdz.pdfIn PDF document text
    • https://gozuneputir.weebly.com/uploads/1/3/4/3/134345179/2288500.pdfIn PDF document text
    • http://bio-ita.fun/devatizefbg85l.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/c12de2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvisefop.epizy.com/navokivabufuro.pdfIn PDF document text
    • http://wuzuruwevirelu.rf.gd/dryer_sheets_for_frizzy_hair.pdfIn PDF document text
    • http://nabafomubibatu.epizy.com/essentials_of_biological_anthropology_3rd_edition_free.pdfIn PDF document text
    • http://muweluboxakok.rf.gd/vurisixodonovavovuvepebu.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_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5332 bytes
SHA-256: 16e9ba573e3a1d68cc9b21560df68d5ed20917e00c6923a0d9c219aa81d8775f
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 10784 bytes
SHA-256: 7642ba8fccab7fc911f616b1fe77381ef59cdecfd0c87de7cf66ff818fd3f545

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