Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c465ac47bf9bf09…

MALICIOUS

PDF

64.0 KB Created: 2021-02-16 22:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e8390133389e44ddf5e95f859add8834 SHA-1: b1c6621d18d0db484ef1e18e9d9c5c9ae5ea5de9 SHA-256: 9c465ac47bf9bf099a93648287c673e24d4c43e9074ccb3b69eff59120d89212
126 Risk Score

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
  • 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://jacksth.ru/123?utm_term=how+to+use+mendeley+reference+in+word PDF link annotation
    • http://bubble1.space/50136194369su0ek.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/w6jcfif/97030006749.pdfIn PDF document text
    • http://tehnikator.ru/netgear_r7000_manual_setup4egb4.pdfIn PDF document text
    • http://banujal.iblogger.org/electrical_and_magnetic_properties_of_nanomaterials.pdfIn PDF document text
    • http://sofoviwov.iblogger.org/ice_age_trail_guidebook.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/jigNXjg/19435118779.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/gFcjfxS/96979143158.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/1giigeu/19907425590.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/gghajhZ/gikifijezivazusizozupuve.pdfIn PDF document text
    • http://terem.space/acetilcistena_injetvel_bulaktwu9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lezegunotoxom.rf.gd/start_tor_browser_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/43569445750.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/reading_comprehension_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bluetooth_software_for_windows_vista_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/96076710091.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_off0000be41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE41 5112 bytes
SHA-256: b451f33aa386dd28590b9a3f2c26502d5bfda8f5fd77a5add6e02d8592c0acbe
font_01_sfnt_off0000cfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA4 10584 bytes
SHA-256: 1ca8973573cb329367cfa5ffd70125cd099c6f719f58d395fe35df4a495a81cf