Malicious PDF — malware analysis report

Static analysis result for SHA-256 267c417b47a11557…

MALICIOUS

PDF

59.1 KB Created: 2021-01-21 13:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 427120b75d2231fe9facd2a54c556c17 SHA-1: e9c95307bd20fc3a9a181ef9fb98922bc7832d96 SHA-256: 267c417b47a11557d03c674a233730b6dcbc24e0be500cf3d3ac0420761cf0d3
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL is presented as an 'Adblock browser apk', suggesting a phishing or malware distribution lure. The ML classifier and ClamAV also flagged this file as malicious, supporting the assessment of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=adblock+browser+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5fbe8c32ee7f6.pdfIn PDF document text
    • https://site-1210486.mozfiles.com/files/1210486/kosidonokigivi.pdfIn PDF document text
    • https://site-1176887.mozfiles.com/files/1176887/xazawewezisubasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5feb8ae0e5faf.pdfIn PDF document text
    • https://site-1257511.mozfiles.com/files/1257511/insect_parts_worksheet_2nd_grade.pdfIn PDF document text
    • http://jiludedo.iblogger.org/investment_portfolio_template.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/46774531559.pdfIn PDF document text
    • https://site-1173526.mozfiles.com/files/1173526/66210522989.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/muwomapotumugi/guverewufutelepojemadup.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/28211757261.pdfIn PDF document text
    • http://nimoxorud.epizy.com/83983440803.pdfIn PDF document text
    • http://putesedesupelo.epizy.com/27365668474.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/26938959006.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/2186655182.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/open_deed_of_sale_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/dototimeratapozalofudota.pdfIn PDF document text
    • http://fusizizugunu.epizy.com/manosidegikizekut.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/midit.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/apple_app_to_free_books.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_off0000b103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB103 5352 bytes
SHA-256: 344340d4a6f888a3482def8d1708e26dae203dbf82ce4d522871ceda71af01b2
font_01_sfnt_off0000c355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC355 8264 bytes
SHA-256: c1b1f0f35ad2907f0f50a1e03d915ea6c7c64a758101b250dd169b76758f51f7

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