Malicious PDF — malware analysis report

Static analysis result for SHA-256 d096ea9999414732…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 11:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c47ab714fdd67a005ff7feb5d70ff8b0 SHA-1: 1da7e3852f511969a6169ddb06b9ad5536d74ce2 SHA-256: d096ea9999414732b8c27a28a0460d4d1dfa19bdc7c0b7953797588d9709fcbb
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains metadata related to PDF generation, but the primary malicious activity is the redirection to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=simple+present+negative+form+exercises+pdf PDF link annotation
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/nipinubaninolara.pdfIn PDF document text
    • https://bowetupivivuz.weebly.com/uploads/1/3/1/4/131437724/3330010.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/divisug.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/natural_urticaria_and_angioedema_treatment_system.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/ayurveda_pitta_ernhrung.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/vakugijogil.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/mudulojufava.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/definition_of_analysis_according_to_expert.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/brady_bmp21_plus_label_cartridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_601c9b6fe10e7.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/82523174796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_601ca7f876025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_6043977df120e.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/venanaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_604ff225e4793.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/sepovutapakogaf/yds_e_anlam_sorular.pdfIn PDF document text
    • http://zigakakedulogim.myartsonline.com/46192017469.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/kijopa.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/27993619799.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/35597005132.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/sistem_informasi_akuntansi_pembelian_menurut_para_ahli.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/present_perfect_progressive_tense_worksheets_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_off0000e747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 5708 bytes
SHA-256: 74587e858701640470972ed6a1578ddcff243a84c9e4f4f58d0c5ac4d5380b7c
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10816 bytes
SHA-256: 7ff729b3a78619ddda7ea77e22b6cb89357d613eff4e574c910244ee4dba7683

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