Malicious PDF — malware analysis report

Static analysis result for SHA-256 11548c2b1fcc1282…

MALICIOUS

PDF

86.6 KB Created: 2021-03-15 10:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1f705c1736ed15b0d169e99dcfb211e4 SHA-1: a15e3798743dd311a5bcee7109ea6712f73c5d93 SHA-256: 11548c2b1fcc1282aaaef90ac72076cad06ff754e7942bbf5fd9554dd74b5d33
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/strik?utm_term=alex+rider+books+nightshade PDF link annotation
    • http://testrun.ru/96153542556yvfpc.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/jupimelapavixapegikepesi.pdfIn PDF document text
    • http://xevimajitufom.iblogger.org/el_cuarto_de_atras_carmen_martin_gaite_resumen_por_capitulos.pdfIn PDF document text
    • http://max-lifting.store/2549326330453h2e.pdfIn PDF document text
    • https://cdn.sqhk.co/nunewole/cgfjbjd/zatenasajiwuxavovosisib.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/mmphegc/warerup.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/why_riba_is_not_haram.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/artificial_intelligence_full_notes.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/guzatupoxexaxufuweliner.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/ihjjeif/11363616862.pdfIn PDF document text
    • http://shothard.site/nipedexoluvunexeraguxoxeru4qz.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/ggjd2hj/75591880565.pdfIn PDF document text
    • http://vienvozvrat.site/roland_td-6v_module9j2ws.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/51841782968.pdfIn PDF document text
    • http://fastpysystem.online/football_fitness_for_10_year_oldspx3si.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_a4517dc247444c6a929b4575e3419c0b.pdf?index=trueIn PDF document text
    • http://gobofitis.epizy.com/the_imitation_game_movie_download_filmyzilla.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_6e9ebdb371804d199422aa4865d46aaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/75085696466.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_1b7ecf41a79c4c3481fe9098a07d8f83.pdf?index=trueIn PDF document text
    • http://vutupaxuvidebif.rf.gd/2000_honda_accord_v6_manual_transmission_swap.pdfIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_365fff8767c24cd294bf1ad098e5a285.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/centre_de_formation_juridique_avis.pdfIn PDF document text
    • http://kagumaxapa.rf.gd/genki_workbook_answer_key.pdfIn PDF document text
    • http://pusumugag.epizy.com/battery_load_test_procedure.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_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 5136 bytes
SHA-256: b93eae0a3802150f10c95cf60506e4daf8a9684a9c22c8d72f19fab3579a505e
font_01_sfnt_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 11300 bytes
SHA-256: 17f62070b9af807d7f8d97b55ad6653e2a09e1664b4f9aa50fe357c9195b15fd
font_02_sfnt_off00013e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c