Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04bbade681f26b9…

MALICIOUS

PDF

92.9 KB Created: 2021-02-28 06:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ec804c2a6f590cdcdd1c1f1f4274b351 SHA-1: 7bc7d9fecb690ff3e362268fee8491e8479c6120 SHA-256: b04bbade681f26b95f02f0761b341ae376f57b744fb27bab15b3cbb417ab3e23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=ne+yo+one+in+a+million+instrumental+mp3+download PDF link annotation
    • https://sefujokugitexas.weebly.com/uploads/1/3/1/4/131408298/tulixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_602a6e41ca836.pdfIn PDF document text
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/fotonegarozuvan-sevubanerogeduw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fd6236e59a81.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/7549441.pdfIn PDF document text
    • http://life50it.pro/beravotunulojol2ed0u.pdfIn PDF document text
    • http://astrology-personal.online/sales_forecast_report_meaning7tqca.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/chc0jjD/cut_it_out_gif.pdfIn PDF document text
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/xaseret.pdfIn PDF document text
    • http://tgesheff.xyz/6.0_powerstroke_fuel_pump_wiring_diagramp67s0.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/gc2igKs/games_cheat_codes_xbox_360.pdfIn PDF document text
    • http://imm-shoes2.club/english_grammar_book_for_class_10_up_boardlgql6.pdfIn PDF document text
    • http://itagreen.fun/ratubepisaxewiravopulv0bfc.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/zesotat/ninja_foodi_pressure_cooker_air_fryer_dehydrator.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/visio_2013_basic_flowchart_template_missing.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/sipasonefovepipax.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
    • 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_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 5432 bytes
SHA-256: 244b76b014a9e4b74a5c637e014ea4ac81815d23098aba9ee2e35ab5fb2e61c3
font_01_sfnt_off00011882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11882 14508 bytes
SHA-256: f613ffa2f74c2569cf43d1bda0ec5eb9ec23a1ce5c7a6fd401e896e647fb750e
font_02_sfnt_off000145e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E4 18776 bytes
SHA-256: 96ab3042575e6db92b7bad1aac42ed8095504d59665b3326cf7857e97d54a14f

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