Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a775c97c2d5db22…

MALICIOUS

PDF

72.5 KB Created: 2021-03-02 14:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a98c110cabdb364cc1c13ec43066200c SHA-1: 2f951180a6cde93165caa0375255214e182b6b53 SHA-256: 9a775c97c2d5db22113f780297aae16ec855b13645224a5a37cfbeef12fc0e42
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are presented as links to PDF files, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=how+to+find+sound+drivers+windows+10 PDF link annotation
    • http://fogarapisow.22web.org/percy_jackson_series_books_free_download.pdfIn PDF document text
    • http://leomannapov.com/snapdragon_equalizer_apk_oreow4kuq.pdfIn PDF document text
    • http://dream-stat.ru/94993413554iumd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_6032f2a3135dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_5fcbb3bee7d92.pdfIn PDF document text
    • http://leqqurint.online/40958772135s20bd.pdfIn PDF document text
    • http://zasosidimul.22web.org/low_histamine_food_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_601037e82843d.pdfIn PDF document text
    • http://jamosaxomexe.iblogger.org/best_blood_bowl_season_2_team.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_601b35082d7e6.pdfIn PDF document text
    • http://xopuwigevifuk.iblogger.org/jotufenizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6038f07309eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_5fd2467037e5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5fc6a442e911c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5ffda7a019dc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwepuxaj.epizy.com/bootstrap_4_admin_template_sass.pdfIn PDF document text
    • http://lezabiwobefek.rf.gd/can_i_airplay_iphone_to_samsung_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/badland_2_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/camponotus_ligniperda_formicarium.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/former_toronto_argonauts_players.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/primary_medical_certificate_application_form.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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 4968 bytes
SHA-256: 05fb7e9401a6c1b83c849ce439ece44613ada7705091373600b3333656816363
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 10300 bytes
SHA-256: 0eedb6d2ace4dc86eecfb5b766211e997870ce0ad86e8d750e82c62f320f8d3b

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