Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00c4bc84dc45dc4…

MALICIOUS

PDF

96.2 KB Created: 2021-03-04 13:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7cdc24071eb76c786fbd62a14661ae60 SHA-1: 6ccf6598716643e4fcf0d97c566e192ed98bfefa SHA-256: b00c4bc84dc45dc44a85bfba139b36d4805e33daba3504bab6282f6f772aac3c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://vilenefex.ru/award?keyword=how+to+do+research+paper+in+apa+format PDF link annotation
    • https://cdn.sqhk.co/wezupobuwab/lXPiihj/dopulijajanowekuni.pdfIn PDF document text
    • http://usesoda.pro/poxivuy4up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5ff21e10dfbc0.pdfIn PDF document text
    • http://pibodusu.22web.org/jagemodisotifi.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/MOifidt/my_smart_house_buffalo_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/jitiKm7/fimimusuw.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/qjejacO/my_verizon_account_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_600c74e05b351.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/understandable_statistics_12th_edition_answers.pdfIn PDF document text
    • http://pakimudemezir.iblogger.org/kumpulan_lagu_alda_risma.pdfIn PDF document text
    • http://fapevenaxopaw.22web.org/bowot.pdfIn PDF document text
    • http://ributufukepun.66ghz.com/delolokomejujezanilit.pdfIn PDF document text
    • http://giocodigital.fun/is_brandenburg_v_ohio_still_good_law6aiw8.pdfIn PDF document text
    • http://ru-1.casa/fender_mustang_amp_v2_70_wattknbu1.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/phenolic_resin_coated_plywood_sheet.pdfIn PDF document text
    • http://gnoogle.site/complete_and_simple_predicate_worksheets_with_answersj0dsr.pdfIn PDF document text
    • http://sowufevoga.iblogger.org/overview_chemical_bonds_worksheet_chapter_19_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5fd11042631b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelepovasogadax.epizy.com/is_breach_notification_rule_part_of_hipaa.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/74238427080.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_96047d4991fe457dbbaf40a452bb7914.pdf?index=trueIn PDF document text
    • http://napilidowolaro.rf.gd/lajol.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_8f903b3b008845b48e9b4f38fe8c8d10.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBA 5416 bytes
SHA-256: 683d90e71cf58ae0a30ac6d5581b1fa025d3734d2d36d5f64904d7977cda092b
font_01_sfnt_off00014e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E0F 10644 bytes
SHA-256: cea5aa4aa3071d3c6c685b9e1c6e45a025be7f9c2ea8ce5af038ecc53ea17db7

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