Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26b2c286c934d3e…

MALICIOUS

PDF

69.5 KB Created: 2021-03-11 12:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 222a36aaa1d686eaf15885aa5826fc2d SHA-1: c8bf6e1869e389ca831d69c6da3def3dfffd294b SHA-256: f26b2c286c934d3ec326eee89fdbf288a3e3fa4d668783184995ea16c9071cc4
156 Risk Score

Malware Insights

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

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 0.9991

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://dugedepap.ru/123?utm_term=caesar+salad+dressing+nutrition+information PDF link annotation
    • https://pewuwokajop.weebly.com/uploads/1/3/0/7/130775265/9407228.pdfIn PDF document text
    • https://jekugisolidib.weebly.com/uploads/1/3/4/0/134097103/xozataloj.pdfIn PDF document text
    • http://naturaleone.space/hd_background_wallpaper_for_pc78cuf.pdfIn PDF document text
    • http://arenda-comp.space/what_is_management_skills_in_pesk8dne.pdfIn PDF document text
    • http://construt.site/nodega0phw.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/fe1e0.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/4223468.pdfIn PDF document text
    • http://innov-cis.net/chimie_gnrale_atomistique5ps7g.pdfIn PDF document text
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/puwamareninobalilobi.pdfIn PDF document text
    • http://ig-about.net/fodozafoxavifana8lvwz.pdfIn PDF document text
    • http://idealica-italy.site/letumawomapoxejerave66fzk.pdfIn PDF document text
    • http://hisgohar.site/kamugunerafa0fh.pdfIn PDF document text
    • http://starconflict-game.ru/kindle_books_appfdr5c.pdfIn PDF document text
    • http://fullpisetc.ru/automotive_maintenance_manualsp0207.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/sizabo/6th_grade_language_arts_worksheets_with_answers.pdfIn PDF document text
    • http://zezatavaveb.epizy.com/bimodal_unimodal_uniform.pdfIn PDF document text
    • http://sifezob.epizy.com/47450878108.pdfIn PDF document text
    • http://fusupufe.epizy.com/legavudetegadetape.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ditigarew.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/r_b_m_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/consumer_buying_decision_making_process.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/best_performing_managed_investment_funds_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/34698241986.pdfIn PDF document text
    • http://jomedive.epizy.com/mamalitaxugamepo.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/9960273980.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_off0000d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 5132 bytes
SHA-256: a4cbe7b6cf8ba0c8b2bac628c3eff9037082eab3692c5ef4d9c7e0840ee11ea1
font_01_sfnt_off0000e33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33F 10972 bytes
SHA-256: 9bddda691ce77e6e79aeb71445f0459da4511d105215aaa9f25a63f0436ca914

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