Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8d63b01d79aaa3…

MALICIOUS

PDF

76.1 KB Created: 2021-03-26 08:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: aa0da832f1222406e0fb9c92302d49fa SHA-1: a516d872ad569344f8281af62c9bafc67e0a5d6e SHA-256: 4f8d63b01d79aaa34f044dc892463646b0e45ea30491a4c7ded58181277445e2
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-focused, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs, such as https://golowaki.ru/strik?utm_term=the+pact+hbo+review, are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://golowaki.ru/strik?utm_term=the+pact+hbo+review PDF link annotation
    • http://sujabupinoda.scienceontheweb.net/90804563111.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/63311631296.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/application_form_for_girlfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/RDI1Cjc/27132199944.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/9nQPkSD/12466388920.pdfIn PDF document text
    • http://naverako.iblogger.org/jonotefido.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/lanaladu/royal_hawaiian_sandalwood_hydrosol_uses.pdfIn PDF document text
    • http://xifabemifuxiza.rf.gd/bopokexumelivugige.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/everfi_financial_literacy_answers_module_8.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/turabian_chicago_manual_of_style_citation_format.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_42a23b5868694b1d8fca8e399c9ebbd0.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_d062b934771d497c95ae3eb8c0eb8e94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/bullying_ielts_reading_answers.pdfIn PDF document text
    • http://nibewisule.epizy.com/fishing_report_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/formal_agreement_between_two_or_more_countries.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/56968634566.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/when_is_divergent_allegiant_part_2_coming_out.pdfIn PDF document text
    • http://pisizupulexus.rf.gd/scrabble_2_letter_words_list.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_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 5052 bytes
SHA-256: 409af21e13698c980f6a117dbbabf75110f1f0441236c2189f086cc21ed05982
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 10848 bytes
SHA-256: 2e4bcce4310dff30facf960a929b1d7930dfb37f8310e0f7ad78b09c3351d111

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