Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6373627e7e8774…

MALICIOUS

PDF

76.5 KB Created: 2021-02-28 18:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ed0264cc876d14298cfd7df8ac1f895f SHA-1: 5dabbc36d17eed32ce8a461618c084c619cf4e3a SHA-256: da6373627e7e87742a534679b3234ff13a4dec0ce4ea76f872b360bc58561586
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=school+for+good+and+evil+book+4+pdf PDF link annotation
    • http://pinopizo.sportsontheweb.net/what_does_the_term_quasi-legal_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_602bf6277013a.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/39150594607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365642/normal_5ffd6063e2a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_602e53e1f31ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_6018794b220a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475997/normal_5fff666dd1c63.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/sinejugusadizuxulufe.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/56996848773.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/ehehaJ1/65381225128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/vabakomir.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/marc_jacobs_shoes_size_guide.pdfIn PDF document text
    • http://girofili.myartsonline.com/pemajokexigomapumipadaruk.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/31906114568.pdfIn PDF document text
    • http://sokobob.epizy.com/shooter_games_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/36146480095.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/45257711441.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/husqvarna_sewing_machines_comparison_chart.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_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 5692 bytes
SHA-256: ff106a0a36c75fd523fecdde8c1bea847e1560ed76763e73437788adf2aacd75
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10208 bytes
SHA-256: fdb3190fef71d8137fcadb59232301a028131b32d4bd5a476e4ad54e61625003