Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bbb646d1f7d3f2…

MALICIOUS

PDF

86.8 KB Created: 2021-01-30 21:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 50df841a9249e426a9cba2348439d2a4 SHA-1: 1d0669592e056de8016db85e53244133c2b3c66c SHA-256: 96bbb646d1f7d3f26d6dda1c4ecb87d724133c07b40b91ed883dc0d664091480
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it is designed to lead users to harmful content or download further malware. The embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=singer+industrial+sewing+machine+manual In PDF document text
    • https://cdn.sqhk.co/vodadavubex/ghLiijb/t_rex_chrome_dino_game_unblocked.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/19d66.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/tuzet.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/iegdhfZ/7062817855.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/ibFjjzd/30494411901.pdfIn PDF document text
    • http://gonugotez.22web.org/vigipaxinasonozub.pdfIn PDF document text
    • http://gawajix.iblogger.org/rutugebudirofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumusejori.epizy.com/8609921003.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/icomania_level_7_answers.pdfIn PDF document text
    • http://wolaniloko.epizy.com/wowanowozasoguninejobemos.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/como_comear_um_email_formal_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/descargar_musica_gratis_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/emanation_tank_guide.pdfIn PDF document text
    • http://fobapisarut.epizy.com/free_halloween_worksheets_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/bootstrap_grid_template_w3schools.pdfIn PDF document text
    • http://fejolisevew.rf.gd/jaxejasufipotalat.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/97784322007.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_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 5548 bytes
SHA-256: 3e5d410c321057d1601c92f9e8c2d1d2c44127083ada7417cd0890a0cc4f8af3
font_01_sfnt_off00012820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12820 11232 bytes
SHA-256: cd6b9523c9beffdbfc734adde18ba9fd4ddcae7fe55f993c8bf2eed6a6d3be37

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