Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16fbfe82d76b207…

MALICIOUS

PDF

66.1 KB Created: 2021-03-24 17:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ab97fb707e3578502c311a0f9e47a797 SHA-1: 3ec2259772a0120ba44aecaf0d90edd2ea0769c1 SHA-256: e16fbfe82d76b20750b806d08ae6a4dc393b7c49940c2d308eda1945911aa279
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, with one specifically pointing to 'https://botokaw.ru/123?utm_term=insurgency+sandstorm+closed+alpha', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=insurgency+sandstorm+closed+alpha PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6043648757214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_600fa3d9ef195.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/kawagimemaze_ropolori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481158/normal_5fff5047a3b9f.pdfIn PDF document text
    • https://xasonametig.weebly.com/uploads/1/3/2/3/132303127/zezozigonuvabe-semafo.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/2362688.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/zdjjYjb/91173235977.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jeib2id/guess_men_s_jacket_leather.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_600e34047df5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458621/normal_6007be8bd574f.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/7805656.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/6hcjcQT/bullet_manufacturing_process.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/3232920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_6040496e98b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_601a2a87b6063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lutudapetasuk.rf.gd/xudasawe.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/how_to_become_a_hardware_design_engineer.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/what_is_the_best_exercise_for_over_40.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/periodic_table_of_elements_printable.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_off0000c6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A5 5524 bytes
SHA-256: 0ba849ad0d46ed7e87dcec2de05d7987b0c0ac4af338a23de99210586b5deb98
font_01_sfnt_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 9520 bytes
SHA-256: a6c14443a7219e300e2fa43ee59f8ce476bde1db255c792a5ac9e16acf26fdd3

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