Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e021fec4e611df…

MALICIOUS

PDF

76.4 KB Created: 2021-04-02 18:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dc4ea7886402c3f5c7c71441a269ee6b SHA-1: 71a08e1fd1d75b9c84c15282b13d291ff994e1d3 SHA-256: d0e021fec4e611dffae0183cdb7c678064a7e6c078c65ad3d1c76461c9f39fe1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to a search query. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, but the presence of external URIs and the overall detection suggest the document is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=coliformes+termotolerantes+definicion+pdf PDF link annotation
    • https://cdn.sqhk.co/badaxiloru/idiahji/98490484072.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/hbCphiQ/french_coffin_nails_designs.pdfIn PDF document text
    • http://wuduwoguto.22web.org/jukune.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/agfgenv/mexadomilobuxijudoja.pdfIn PDF document text
    • http://nozekem.iblogger.org/sevugel.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/iyjj1hb/heroism_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/hakushu_kassai_utaawase_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/14613167899.pdfIn PDF document text
    • http://melaworogafema.epizy.com/xujarunetumabebulipe.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/blackmagic_intensity_pro_drivers_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7ba268-0b2b-48b3-8264-20466a75cee7/stihl_ms310_chainsaw_for_sale.pdfIn PDF document text
    • http://digomal.epizy.com/final_fantasy_7_official_strategy_guide.pdfIn PDF document text
    • http://wupokutixu.rf.gd/anti_ulcer_drugs_list.pdfIn PDF document text
    • http://rupilozomu.epizy.com/lovitexas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0013f7-0eea-431d-a2fd-4629af46579c/pecha_kucha_powerpoint_template.pdfIn PDF document text
    • http://warufadul.rf.gd/15092885169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19628ff2-31dd-494e-b798-73b723c33eae/the_5_dysfunctions_of_a_team_audiobook.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/xakemilisewod.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/how_to_use_nespresso_delonghi_lattissima.pdfIn PDF document text
    • http://neguxonef.rf.gd/bharatiya_vidya_bhavan_sanskrit_books.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/pre_b._ed_exam_form_2018.pdfIn PDF document text
    • http://kokegewabero.rf.gd/tezixariso.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/alexander_the_great_quotes_on_death.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5208 bytes
SHA-256: 46723a5626504b312efc4a32715d27f1f788846c5c1641f17860f98a5678f099
font_01_sfnt_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 11972 bytes
SHA-256: 4eebc77997856f4027e00f413e1cc561a617431803fb9511765965a82c100385

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