Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfbb9bdcb02d3c…

MALICIOUS

PDF

75.7 KB Created: 2020-12-31 17:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b61ea70930f1a8cde93f4549181814ab SHA-1: 6fff0962b92a4ac27a0f18409594d18ccfcb6051 SHA-256: 72bfbb9bdcb02d3cb57b7ca84cd6a03119ff5c57f6b82aec568a9acde398c3ef
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to funnel users to external sites, likely for phishing or malware distribution. The ClamAV detection further supports its malicious nature.

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
  • 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://gettraff.ru/strik?utm_term=dodgers+world+champs+2020 In PDF document text
    • https://cdn.sqhk.co/kinibemazoz/WSx2ZqJ/lapse_a_forgotten_future_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/BW2Ejja/alumbrado_publico_zapopan_reportes.pdfIn PDF document text
    • https://cdn.sqhk.co/dokijesu/674Dhfm/your_texas_benefits_renewal_application_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/6ghha6o/carnatic_singer_sowmya_husband.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/9015787.pdfIn PDF document text
    • https://lomivurusizova.weebly.com/uploads/1/3/4/8/134868764/dipaxiluge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1261c937-d03c-42f5-b2c0-9869315befac/82071197834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efea292-337c-44a6-b685-0d20de718822/i_do_mind_dying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ac5af3-40d6-453f-8787-9c3be0256217/10262541679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30651d0-430f-44bf-8a7b-da999f331f0a/29422727204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f69205-faa0-48f3-984f-9d3a749c397b/73494635715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a28294a-55f8-4ef9-b276-e4490049b041/jopejudizumomejupob.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5852 bytes
SHA-256: 7f26ae6ef78e48f7b455ffbae24d25251fd59cd7a55e50580570155e8d7072b0
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 11692 bytes
SHA-256: 1f8e042f469ad6c292ceecab9f0f610b669c4bdcea7f5dd073c1ae4908b757f5

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