Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfb34a77dfff716…

MALICIOUS

PDF

72.1 KB Created: 2021-04-06 23:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dccc1b14440043e6c9fecabce2270e7a SHA-1: 3a6e397be9128c3c8cc1c2e78c8f0fd6ee565781 SHA-256: 6bfb34a77dfff716a55867920b0b5e7b4834e5a071cbeaee26d410592f31c6c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=bc+rich+warlock+bass+neck
    • http://alifan.store/68235389469odbm5.pdf
    • http://help-igcopyright.xyz/racing_fever_unlimited_money_hackoktm1.pdf
    • http://hookup682.site/internet_explorer_version_11mpqn7.pdf
    • https://cdn.sqhk.co/zewumabigige/jgf3jgf/19014102683.pdf
    • http://lomizagin.iblogger.org/57692270865.pdf
    • http://vbnmcxz.xyz/how_to_replace_lg_glass_cooktop89mxq.pdf
    • http://netzamka.ru/dewalt_scroll_saw_stand_instructionszsdsf.pdf
    • http://raisinsapp.pro/whole_book_of_enochzrjj1.pdf
    • http://gelokan.sportsontheweb.net/netovunudinitifod.pdf
    • https://cdn.sqhk.co/disegivoji/NogjUha/ramudesididaremitipuset.pdf
    • http://tikanaw.mypressonline.com/automated_parking_system.pdf
    • http://pc-remont.website/best_graphic_design_portfolio_sitesjbkfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nekezoxugi.rf.gd/amebiasis_diagnostico_y_tratamiento.pdf
    • http://jebikevatuj.epizy.com/movesaxalipomexepuxa.pdf
    • https://s3.amazonaws.com/wulotugadag/jezojexipevatisoxanukokam.pdf
    • http://wovibojo.onlinewebshop.net/pec_241_7_paginas.pdf
    • https://s3.amazonaws.com/mojivikapeti/what_is_the_purpose_of_a_descriptive_text_structure_what_does_it_do_for_us.pdf
    • http://supajiwa.myartsonline.com/87687408401.pdf
    • http://bemuvarewu.onlinewebshop.net/benzodiacepinas_en_ancianos.pdf
    • http://dimafox.epizy.com/vivovudazenulozaporaj.pdf
    • https://s3.amazonaws.com/xefezesebusu/how_often_should_i_change_the_transmission_fluid_in_my_2012_honda_civic.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9b.bin
dff9865719b937e23bbf434dd518f1f1a69400e131b0a239db9bbde9316f9e3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 5232 bytes
font_01_sfnt_off0000ee77.bin
02ac171939fb82a0e552705d93e6108480332f63ce6e8bcebb6dc9750b349806		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 10824 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.