Malicious PDF — malware analysis report

Static analysis result for SHA-256 9452ac68a8392ddf…

MALICIOUS

PDF

78.4 KB Created: 2021-04-16 04:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6affb83e1f9b2e794d6eef3542e1968e SHA-1: e991831c39774d0d06d2fd2316ca6a1629df3b62 SHA-256: 9452ac68a8392ddf39b27bf44cecf313659af2107ad65dc46d366a63573d23a9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to movie downloads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ponafet.ru/strik?utm_term=perfume+the+story+of+a+murderer+full+movie+download+in+tamilrockers PDF link annotation
    • http://tuderoba.getenjoyment.net/60046490768.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/f29a7e04dd66.pdfIn PDF document text
    • https://lotetirupaxep.weebly.com/uploads/1/3/4/0/134013035/8391502.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/heRhehf/final_fantasy_brave_exvius_esper_skill_guide.pdfIn PDF document text
    • http://cafechorsu.ru/what_does_mars_symbolize_in_astrologyqoyyg.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/jonuvodusulomakinu.pdfIn PDF document text
    • http://krokoboko6.xyz/24553785331icuws.pdfIn PDF document text
    • http://stav-games.ru/66505300955p6eiu.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/intermec_pm43_parts_list93z02.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/6z6idEK/bmw_320i_xdrive_touring_performance.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/5566068.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuwozelob/KvgcYgj/archery_shooting_champion_kingston.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/idjcehd/50953729112.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/M4khfjd/14684372009.pdfIn PDF document text
    • https://sawagifavemon.weebly.com/uploads/1/3/0/7/130775832/a452e95ea4edadf.pdfIn PDF document text
    • http://raicen.com/how_to_install_trx_at_home3v0i1.pdfIn PDF document text
    • https://tarokomilidifuz.weebly.com/uploads/1/3/1/6/131636676/vomukebuzibipepitixu.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/iso_9001_certified_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakebixulo.epizy.com/baltasar_gracian_libros.pdfIn PDF document text
    • http://vurosija.epizy.com/terawuwivoxezesuferubatez.pdfIn PDF document text
    • http://rulenanevatetid.epizy.com/switzerland_visa_lottery_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/news_report_example_school.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/transformations_of_the_rational_parent_function_worksheet.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/19639472354.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/21915373540.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/marcy_weight_bench_with_lat_pulldown.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/78230958833.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/pojulifigawelabibizu.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_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 5580 bytes
SHA-256: 7947d4c2585b455ca1f951a0490edb8136d674fa06decfb6d23a625f6f8b1a05
font_01_sfnt_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 10532 bytes
SHA-256: 5fa6233e56028418a73464c3541a98bdf7c70dcd18c3509aec7f3df9834d32a7