Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97a372f1532513a…

MALICIOUS

PDF

85.6 KB Created: 2021-03-18 07:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11af130add163305b5ec057b51c010d0 SHA-1: 1030b0ed874222e9877cf1b5f618ddcee259a39b SHA-256: d97a372f1532513ab27cb767faff887f27afdfd614956e504e9a54d573aac2e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=antissepsia+e+assepsia+pdf PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/ifv0hbu/nonovapibalunosefelegeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5ffc33bf775b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_603a147ad168e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5fc9c73ddad87.pdfIn PDF document text
    • http://hookup666.site/how_to_stop_buying_clothes_online6lb46.pdfIn PDF document text
    • http://vatetuda.scienceontheweb.net/britannica_visual_dictionary_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gukituzaju/ghg8uge/sepezekudisug.pdfIn PDF document text
    • http://weraka.online/foraputonimsgqye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_6032f7b7a01c7.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/U0ijhbE/bowisafunuwisipigevu.pdfIn PDF document text
    • http://kinoxca.xyz/the_hierophant_reversed_meaning_love6u1ug.pdfIn PDF document text
    • http://usesalle.xyz/weber_grill_parts_flavorizer_barsobidl.pdfIn PDF document text
    • http://autolombardpro.ru/91273655542y5xio.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/7jggcMn/54071428590.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/kigavanus/waiting_for_godot_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/9681742672.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/64576645784.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/parts_of_the_body_worksheets_for_kindergarten.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/xopugenevisome.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/jatamenefufepa.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/93564999914.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_off000113a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 4896 bytes
SHA-256: 90eddbd3eb066066c158ce765beecbb5dfd626a3b17a69788109f363d0b27f58
font_01_sfnt_off00012462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12462 10864 bytes
SHA-256: 2355e4fd344ad36725eb89127e059df8a9ce73320e8cf71d1c405de1e1c3c203

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