Malicious PDF — malware analysis report

Static analysis result for SHA-256 42133ef8802f9231…

MALICIOUS

PDF

70.8 KB Created: 2021-04-03 22:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f45f9b6ffb3dc3abb43d710b518ed1c6 SHA-1: 9d403b2793c177d11f67306d481ce75b15a28e96 SHA-256: 42133ef8802f92312f78b1ffe9f9e933d215f18eed5757093e0c16567cb076c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to redirect users to malicious sites, likely for credential harvesting or second-stage payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=csec+english+b+syllabus+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/lasokixon/Djhij4W/outliner_pens_walmart.pdfIn PDF document text
    • http://vehicleusains.com/38780792427w9qrc.pdfIn PDF document text
    • http://kpupnov.pro/walipisupemofifofifednbku.pdfIn PDF document text
    • http://datab.vip/jimelibanubomiput07m5.pdfIn PDF document text
    • http://metinozub.iblogger.org/3m_di-_noc_spec_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/jejdsNJ/falling_lyrics_harry_styles_youtube.pdfIn PDF document text
    • http://wtia.space/211811030280fy5p.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/Xejqsgf/bi_annual_report_2017.pdfIn PDF document text
    • http://sneakerspapa.store/57413983946xs57x.pdfIn PDF document text
    • http://biraxubidu.22web.org/nenovuguratezepagateduxu.pdfIn PDF document text
    • http://tortomsk.ru/adjectives_to_describe_rainforest_animalsndbs6.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/iihcje3/can_you_air_dribble_in_field_hockey.pdfIn PDF document text
    • http://jadebey-x.com/crescendo_book_age_ratingj3cvu.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/Jfjdjhr/62816656257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_ec0387dfbfb54e9fb8e76965ac3bd7b4.pdf?index=trueIn PDF document text
    • http://pikizefomuwajo.rf.gd/dajumajov.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/academic_research_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/35506275107.pdfIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_a914a944ea2241f3adaee261c98b04d0.pdf?index=trueIn PDF document text
    • http://wekiwuja.rf.gd/torugukulilobulup.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/dasoseporusam.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_f047676268d044f2aa99bfd34d6f5c71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/evaluation_report_sample.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_off0000d4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 5744 bytes
SHA-256: d64f37cbd9e1d521018a672749deb88c29d4ed10994ae9ffa29f93f9699afe72
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 10476 bytes
SHA-256: 539c410c20064bffbb96e25ecb75e71c103cb5b6d07eec8053cbb26b7806aadb

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