Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7d026d3c5cf9cf…

MALICIOUS

PDF

70.5 KB Created: 2021-02-07 05:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e02d70cc2ac2ffbbb47c7998c6dc6d18 SHA-1: 9ff40b9a405ccb23c454a36aba3c607cf9c5a588 SHA-256: 7f7d026d3c5cf9cf8bf64af7703015b9a1fa97b7d7c2f1ce6c12abd2d18ec23f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/wb?keyword=leave%20application%20format%20in%20english%20for%20college PDF link annotation
    • http://energierecrute-emplois.com/intermediate_accounting_test_bank5ad8i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_5fe78c51576f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477373/normal_5fe3a34a3fa69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_6017b83c58872.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/eNijhbz/71049698596.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/1590402.pdfIn PDF document text
    • https://mosezogojufotu.weebly.com/uploads/1/3/0/8/130813841/7c03ed851b14b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496811/normal_5feb2d12cc2c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5ff0929418472.pdfIn PDF document text
    • http://stalekost.site/ethical_standards_for_human_service_professionalsep1uw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60143b26b8d1f.pdfIn PDF document text
    • http://esportzmlevent.com/86117626005p734s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5ff03b4daf65f.pdfIn PDF document text
    • http://regvoolkim.website/mastering_chemistry_answersqwv4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_600a4a3a52b41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 5428 bytes
SHA-256: d7efc7e49b19584b98726e3e11ffb578801500f0b56f3870249f0b463c7869f1
font_01_sfnt_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 10588 bytes
SHA-256: 0e8e741d1270fed8f731ee082a68db69b12cb102484d283e9bebadb821b10b9f