Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee25b97556f62de…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 09:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 91b44fe37339596abdefb02d55781ba6 SHA-1: c44876fa7d61967ed2d2f9bfaba196d543d2b6e1 SHA-256: 1ee25b97556f62de9a5cfcdbcbc026898d73fd47e45e9558f820fb5d99307b39
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious or unknown domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/award?keyword=bncc+pdf+download PDF link annotation
    • http://metalllift.ru/48673358202gj8kz.pdfIn PDF document text
    • http://afracheat9.xyz/how_many_chapters_in_fnaf_the_silver_eyes42c19.pdfIn PDF document text
    • http://vivadoctor.ru/wimidalumazugqu61.pdfIn PDF document text
    • http://artistichomesolutions.com/84487397788hs7px.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://relax35.ru/88679335365bh3om.pdfIn PDF document text
    • http://fastpeysistem.online/the_communist_manifesto_karl_marx_download0n804.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/bien_dit_french_2_textbook_answers6g51p.pdfIn PDF document text
    • http://proita.space/how_to_make_epsilon_sign_in_latexpofjb.pdfIn PDF document text
    • http://gelchlen.fun/integral_of_2x_arctan_xfk7c0.pdfIn PDF document text
    • http://bulewedulipofam.iblogger.org/gubilevosutet.pdfIn PDF document text
    • http://ersoil.fun/who_all_died_in_the_percy_jackson_seriesucuyy.pdfIn PDF document text
    • http://detonic-official.website/13414750028q8uly.pdfIn PDF document text
    • http://negodebozebe.iblogger.org/self_introduction_for_interview_sample.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jevedijadiki/what_is_the_difference_between_kcl_and_nacl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe05861-13a4-403a-a45e-0d0552262b15/how_to_install_gimp_user_manual_locally.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/percy_jackson_tv_series_disney_plus_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81542af5-b901-442d-a27e-2782068651dc/wekitefixe.pdfIn PDF document text
    • http://vumafovixono.rf.gd/pmf_vs_vs_cdf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b97d9a-3110-4045-8a63-45a988544743/tigafusexikit.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/jenoptik_ag_annual_report.pdfIn PDF document text
    • http://xamipekuxedatif.rf.gd/bhai_dooj_ki_kahani.pdfIn PDF document text
    • http://mezotavexojo.rf.gd/27610257303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7d5d02-f9ee-41c6-b9a0-59a4aeacfaea/portland_1750_psi_1.3_gpm_corded_electric_pressure_washer_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 4560 bytes
SHA-256: bf0a660a57e8030fe8e4fdfebf3db9a2959883b327fe23b6d129576746021b07
font_01_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 12852 bytes
SHA-256: f018ad701da2cec944711c25423ea28d6a21c29bd5b156f860a4794c2b27fd02
font_02_sfnt_off000116dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176