Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00b48ebb9551a99…

MALICIOUS

PDF

68.3 KB Created: 2021-03-14 03:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8a10c7ccb7d510766d4e03ccee4e0c92 SHA-1: f9375b8561e6c156150357f5c0d80b8943547ee4 SHA-256: e00b48ebb9551a999af991700b3303c3aa91a0b6d7146d104d7f6eaf9072e29b
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs, with a primary suspicious URL being https://xezojetit.ru/wix?keyword=ems+field+guide+2017+pdf. The PDF's structure and embedded links suggest it is part of a link farm designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=ems+field+guide+2017+pdf PDF link annotation
    • http://xugaguf.mypressonline.com/access_grade_6_workbook.pdfIn PDF document text
    • http://fovazewo.iblogger.org/munchkin_bottle_warmer_replacement_parts.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/bose_quietcomfort_15_stopped_working.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/how_to_list_multiple_possessive_nouns.pdfIn PDF document text
    • http://savineme.mywebcommunity.org/xebemakuxedake.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/english_grammar_test_for_interview_with_answers.pdfIn PDF document text
    • http://vafakewa.iblogger.org/aeolian_landforms_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d60663f-d52a-4029-8e0e-c9a32ff77bd4/54784063007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f796e9b-0e28-4b85-a05d-129399c8bf21/89411320338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f478bb4-9977-4d74-82a5-a29d88baa160/gomepufelizorasugumovigol.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/aerith_s_theme_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/broadcast_receiver_to_check_internet_connection_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dc2e2f-98f9-400a-b4d1-66e39bec5b9d/xafon.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/what_marvel_shows_are_coming_out.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_27ee3a8bd7a64c68b532826b8067a418.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_dbf31eafc1af488484fb8d4b79de1a7c.pdf?index=trueIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_f579eeab5039470f90afd60505fa05bf.pdf?index=trueIn PDF document text
    • http://depupumuda.rf.gd/el_inversor_inteligente_libro_completo_gratis.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/bsc_computer_science_tamil_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/61534929572.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_5c13b9475e6647ba94db62a85b82c78d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/i_c_c_u_full_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_off0000cc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8A 5416 bytes
SHA-256: d83ba20b0de8e39a76dbb06881ff006fd62c70c27126c03bca405221def84bb2
font_01_sfnt_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 10824 bytes
SHA-256: ee11fef23995b071632e23786fca1c3a792e7f6e600029a308a099471b72261e

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