Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e485456f9148e8b…

MALICIOUS

PDF

90.5 KB Created: 2021-03-09 18:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fb5974b63485c68bf7a5e1619a1afc8e SHA-1: 3a7179dd940387a8a02275936d462fb092625667 SHA-256: 9e485456f9148e8b4e81e15c9d3d542095c0fc28fcf52a31bb46c157a8b115b6
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://golowaki.ru/wix?keyword=pokemon+emerald+move+tutor+rock+slide PDF link annotation
    • http://xakerof.22web.org/manual_pratico_de_auriculoterapia_gratis.pdfIn PDF document text
    • https://jexelokase.weebly.com/uploads/1/3/5/3/135321670/2d28f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_603214860c1f8.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/32633de.pdfIn PDF document text
    • http://helpforteam.com/walmart_inventory_checker_ps58g0lr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_6021f88417d87.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/venodokuxowejes-kanovow.pdfIn PDF document text
    • http://lodorobirat.22web.org/dialectica_materialista.pdfIn PDF document text
    • http://puxuwowu.iblogger.org/kixudojekelagepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_603d3d6cd52c3.pdfIn PDF document text
    • http://disconto50.info/32319732898s2i0t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabavujafus.epizy.com/procedimiento_de_aspiracion_de_secreciones_tecnica_abierta_y_cerrada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5188d7-a007-448d-b9a9-e99e13392692/karcher_k4_pressure_washer_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9056635b-16d1-4e2d-a8f0-55d5e2059c97/22227806379.pdfIn PDF document text
    • http://moraruvotu.epizy.com/64817519490.pdfIn PDF document text
    • http://zikixixofav.epizy.com/gowedifobojenokujazigiko.pdfIn PDF document text
    • http://juvixote.rf.gd/free_common_core_math_worksheets_for_8th_grade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 3844 bytes
SHA-256: 1eb766d879b526eec5f818e9c1c824346f5243a291e5a3fc56e06da6fc918188
font_01_sfnt_off000118a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A6 5208 bytes
SHA-256: 57c1ec680b130b48ac0a5b8f523afb36f6d5b28e8ad31c85138940932e666838
font_02_sfnt_off00012a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A52 15496 bytes
SHA-256: 49da674fa02c740c7bc75f56c9f8a5e191589c0d26c4153a17094c0f33585d82

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