Malicious PDF — malware analysis report

Static analysis result for SHA-256 b968dc8dda7b753a…

MALICIOUS

PDF

82.6 KB Created: 2021-03-24 11:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eff8758107bf5589655487b995bceaed SHA-1: 168ccfff9428d82fe7d05882c06774ec502ff7a6 SHA-256: b968dc8dda7b753a9359d0075e582fecf181bb21bf773fbb2343a1cba7f718b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9954

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://seumenha.ru/award?keyword=useful+synonyms+for+ielts+band+7+9+pdf+download PDF link annotation
    • http://newuwedeza.mypressonline.com/19340223605.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/htgigHX/deathrun_portable_mod_menu_script.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/bobcat_s650_code_m6803.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/fugodadete.pdfIn PDF document text
    • http://logowiwubapokar.iblogger.org/67131749161.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/giHjdpx/air_traffic_controller_requirements.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/03_yamaha_kodiak_400_4x4_value.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/51085898704.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/30628763300.pdfIn PDF document text
    • http://bapaweki.22web.org/google_dark_mode_android_pie.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/cisco_ccie_security_v5_download.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/agdhjgh/33376171143.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/universidad_del_tolima_sede_tunal.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/why_does_my_torpedo_heater_keep_shutting_off.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molopafefo.rf.gd/kindergarten_fill_in_the_blank_worksheets.pdfIn PDF document text
    • http://bimogafokusifav.epizy.com/oracle_date_format_month_abbreviations.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/bajrangbali_whatsapp_video.pdfIn PDF document text
    • http://miruwofewap.rf.gd/56079050425.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/fawurefagiwifatisumozobu.pdfIn PDF document text
    • http://lazavosapazogil.epizy.com/kilujigifapakojegerokida.pdfIn PDF document text
    • http://gedonoseg.epizy.com/aa_aa_aashiqui_mein_teri_ringtone.pdfIn PDF document text
    • http://vefagukolile.epizy.com/lasefi.pdfIn PDF document text
    • http://wazinupizut.epizy.com/thermodynamics_for_dummies_barnes_and_noble.pdfIn PDF document text
    • http://kileduf.epizy.com/university_calculus_3rd_edition_answers.pdfIn PDF document text
    • http://fefekug.rf.gd/android_calendar_app_without_google_account.pdfIn PDF document text
    • http://zudakilaf.rf.gd/massey_ferguson_35_repair_manual_download.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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 5540 bytes
SHA-256: 31f081eddf518bd506d15970bb5eede1c283839eea661d8d40bb6db7aa3939a0
font_01_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 5748 bytes
SHA-256: 0772e928779b06db417e5601e3bbf987c95807458712daf127e0ccc9c046b1f0
font_02_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 11176 bytes
SHA-256: 15d3074b34024a611b4fa4477277e9a830a06367df56e0c820eb31933bfd8632