Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e063686c41a005…

MALICIOUS

PDF

85.4 KB Created: 2021-03-22 09:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 41a5376f5f5725e8e0ed6130baa5cf81 SHA-1: 94f1de7536cf219270e73503afa0b014b04ce7d3 SHA-256: c0e063686c41a005f1be229d9a1d2117015a2c5b96456cd67f08661f916a1ef7
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=a+level+quantum+physics+notes+pdf PDF link annotation
    • http://janizejekifajab.medianewsonline.com/telecharger_roman_la_boite_a_merveille.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/quote_from_the_little_prince_about_stars.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/archaeological_study_bible_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475380/normal_5fcd06cb75fac.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/82825299904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426409/normal_6008dec3b07d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_604d72b3c017a.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/matthew_7_niv_bible_gateway.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/sojozogixolo.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/what_are_the_disadvantages_of_mobile_phone_in_hindi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_5fd1dcbb8fe46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_5fe0b21553055.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/33972072975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_602e6c7653a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_60446e3c187b4.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/pretty_little_liars_the_perfectionists.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/apex_tv_codes_for_xfinity_remote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425237/normal_5fffa777557e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_60568ad6b8460.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/how_to_replace_a_septic_drain_field.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavatesivo.myartsonline.com/britannica_great_books.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/calligraphy_letters_download.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/subject_and_predicate_worksheet_for_grade_4_with_answers.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_off000104bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 5576 bytes
SHA-256: 581795baa07d13759eb61e10d60615499628248febe09fd73767cc4e786ba8d5
font_01_sfnt_off000117a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 14388 bytes
SHA-256: 082dc80f6b1ef5037ccd5d72846d3882285e7b9f55ff249c9c5d9f7850b43eb2

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