Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48bb2d6b72a0657…

MALICIOUS

PDF

87.3 KB Created: 2021-03-21 04:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a6f392b9eaf8fdf38a2a0f7039e2d7b6 SHA-1: ce2fe0f1e0bcd22c46121e060740ea28264434c8 SHA-256: f48bb2d6b72a0657b7b58e2eb777d1b977899a0e193fdf99bde1f671a667ef38
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URLs, with one specifically pointing to a 'wix' keyword, suggesting a potential phishing or malicious redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, reinforcing the malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=apollo%2527s+lyre+xenia PDF link annotation
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/judinesopozovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_603a6aa9808af.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/edexcel_a_level_chemistry_paper_2_2018_mark_scheme.pdfIn PDF document text
    • https://zatugole.weebly.com/uploads/1/3/1/8/131856706/pozofi_valeromamudab.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/present_simple_present_continuous_exercises_upper_intermediate.pdfIn PDF document text
    • http://ecoservice-vlad.ru/wagirexegavebuhmfq3.pdfIn PDF document text
    • http://biweekamnf.com/xakojazdly47.pdfIn PDF document text
    • http://maska-respirator.com/tupoboselewolrqfk2.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/divx_converter_10.8.7_serial_number.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/61250867035.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/seven_stages_of_love_book.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/77162298748.pdfIn PDF document text
    • https://xowarumi.weebly.com/uploads/1/3/4/5/134519529/accc10dd.pdfIn PDF document text
    • http://didazema.mypressonline.com/xujodagerafabipiwanejotu.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/microbiology_wessner.pdfIn PDF document text
    • http://triple-doska1.club/new_york_metro_map_2019h221d.pdfIn PDF document text
    • http://larebalin.mypressonline.com/oral_b_toothbrush_heads_for_sensitive_teeth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_6022e97f02107.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/zumugoxowosilaxid.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/cuales_son_las_propiedades_de_la_potencia_en_z.pdfIn PDF document text
    • http://detonic-italia.website/open_g_tuning_chords_for_guitar3cpmz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wipibefab.onlinewebshop.net/carb_cycling_meal_plan_male.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/amenaza_de_aborto_tratamiento_indometacina.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_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 5008 bytes
SHA-256: 6868a11023d0574585bf13c42b5f7a762175cbc64743f3644963865f6b98b162
font_01_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 10884 bytes
SHA-256: 2c20463941e2a628bd3d09af7d5791d2f288eec888eeeca90349fceac05f4128

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