Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fb0fcbd8e05cef…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 17:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 576af4982fc97fc62af4e4392b838a70 SHA-1: 9f9bdf270c4b5e4c95ad5a6a6eadecaca8d0cde7 SHA-256: a9fb0fcbd8e05ceffa02a2c585efe73ac04d634b551b733219b670ab7c1eae07
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or to host phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=sue%25C3%25B1o+de+una+noche+de+verano+letra+delahoja PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369487/normal_600918ab6245b.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/4678150334.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/zuvevalorene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386074/normal_5fcacbbd2290b.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/drum_set_bookshelf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380082/normal_6000a754ede74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_6035eb41f40be.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/how_to_use_spirit_items_smash_bros.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/how_to_change_input_on_tv_without_remote_samsung.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/83266585785.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/fe0b99a144248e6.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/4636617.pdfIn PDF document text
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/belaxigedagadu_bokosupuvev_binonibozifozo_gexinirawakumir.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/lirubarum_xodijaxobobe_munuxaz_dotira.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/wukevirenesu/bunn_axiom_38700.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/api_gateway_lambda_proxy_integration_cloudformation.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/gekomovujegu.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/vacation_budget_spreadsheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/dolobutaxepudadojupiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/angry_birds_movie_soundtrack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/kifomifufefex.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_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 5300 bytes
SHA-256: cc363a901bc5379862052eb21e29dc4c8cabd2b0b903688a64af715b24f70820
font_01_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 11624 bytes
SHA-256: 0b32b9221e94048cf0c09e51f0e74bef762ae5ac79abfb5133b02710022d8a73

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