Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d547468f13ac9e…

MALICIOUS

PDF

84.6 KB Created: 2021-03-22 06:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0a9f4720e89010868351d4ea643ba8d6 SHA-1: 26ffa7f78e53a376c298a9ae1454567ed0e38ac0 SHA-256: e4d547468f13ac9e91bfc13da014fa661f45bff5cc5e2ce51db6e2202f923aae
166 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting and a lure for a password-protected archive. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/award?keyword=reading+fluency+passages+high+school+pdf PDF link annotation
    • http://fragcups.com/bixipimajorepu6fdqz.pdfIn PDF document text
    • http://thecabinets.xyz/dont_look_back_full_movie_20099e314.pdfIn PDF document text
    • http://kosadezisadin.22web.org/sql_interview_query_questions_and_answers.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/fifakedodabemiwpx0.pdfIn PDF document text
    • http://interbankdigital.com/how_do_i_find_my_ups_shipping_account_numberbz3pg.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/free_music_websites_for_schoolyvlye.pdfIn PDF document text
    • http://xetudevera.22web.org/gudutojiwolasilovibiluje.pdfIn PDF document text
    • http://huseyincanx.com/matlab_source_code_for_image_processing_projectsp931t.pdfIn PDF document text
    • http://4gusevshop.website/86914373705yt12o.pdfIn PDF document text
    • http://megatorg.ru/husqvarna_chainsaw_435_change_chain10iw0.pdfIn PDF document text
    • https://cdn.sqhk.co/butixasa/gojjeiU/simple_business_impact_analysis_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/bicLzjd/17764213987.pdfIn PDF document text
    • http://demask.space/70175358157kkhgl.pdfIn PDF document text
    • http://fruit-italy.space/90532218724xm4lk.pdfIn PDF document text
    • http://perfectiona.online/puvebufowaguve51ql5.pdfIn PDF document text
    • http://ketorebagibof.22web.org/8253990848.pdfIn PDF document text
    • http://tryici.xyz/admin_password_recovery_isovjtk2.pdfIn PDF document text
    • http://adminhalil.com/xalukitasiwitorjlikh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_e673160a9f78457f905274abd0da8d3b.pdf?index=trueIn PDF document text
    • http://lizolejixo.rf.gd/subway_surfers_chicago_mod_apk_2020.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_956a02ff9b6d4e6bab3aad44c4517387.pdf?index=trueIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_d97ed822fddd4555ae58d4deb279bb9d.pdf?index=trueIn 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
    • 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_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 5432 bytes
SHA-256: 789a89a20b8bbbfd38dc96d4d93c51d0b7ea0eded219d350f416b32df2043834
font_01_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 10440 bytes
SHA-256: 1cb08bd590e12c994035674e75ac40c319a14c6ba5759487991b05346f872d6e
font_02_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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