Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee023832c636fe7d…

MALICIOUS

PDF

81.7 KB Created: 2021-02-24 01:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 15f00f5d48f49c7a361d0b4fa25b5c40 SHA-1: e7cd9302855c4d12dd54630fa8b175d58364969a SHA-256: ee023832c636fe7d3cf842d74da2f6372a4ef923f1f585eee1eed0650d7f7ebf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or phishing. The presence of external URIs and the link farm heuristic confirm the attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=using+two+voltage+regulators+in+parallel PDF link annotation
    • http://itverys.space/the_sims_4_grafting_guidebl9m6.pdfIn PDF document text
    • http://deemonatrafik.xyz/movebgiyp3.pdfIn PDF document text
    • http://maturibcgj.space/47696589606q3exx.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/gfjajd8/77082176466.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Z1Igeea/cops_and_robbers_2.pdfIn PDF document text
    • http://vesefotaso.iblogger.org/11490480241.pdfIn PDF document text
    • https://ruxakidefo.weebly.com/uploads/1/3/4/1/134131713/6814059.pdfIn PDF document text
    • https://gevamimukeruku.weebly.com/uploads/1/3/4/6/134656740/6894298.pdfIn PDF document text
    • http://wupofifaxixusi.66ghz.com/44195297026.pdfIn PDF document text
    • http://bitejes.iblogger.org/reading_passages_for_toefl_ibt.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/ggjdrhd/chicken_invaders_2_free_download_software.pdfIn PDF document text
    • http://puxuwowu.iblogger.org/gativux.pdfIn PDF document text
    • https://kinajerabisar.weebly.com/uploads/1/3/4/7/134748515/josekilunubiz_fadirunugesi_wipemapife.pdfIn PDF document text
    • http://goproonly.com/practically_cheating_statistics_handbook_3rd_editionkrpwk.pdfIn PDF document text
    • https://jerumegilaguro.weebly.com/uploads/1/3/0/7/130776399/nudil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://divejekojo.epizy.com/bhojpuri_bhakti_audio_dj_song.pdfIn PDF document text
    • http://ximedamolaxeve.epizy.com/rescinding_an_offer_of_employment_template.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/jawarolosizijup.pdfIn PDF document text
    • http://renodiwug.epizy.com/canon_rebel_t3i_eos_600d_manual.pdfIn PDF document text
    • http://wosimudekefa.rf.gd/kunuzutetavisufepex.pdfIn PDF document text
    • http://fotisojaz.rf.gd/44777092709.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_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 5132 bytes
SHA-256: 6925c8bbfc61eb2de259b5ee5852b9a1f21da0e3313132f9a49fbe32b6f33f34
font_01_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 13440 bytes
SHA-256: f3238878d93fcca6f234e48e0d45cb134ef52822af4e07eb05b0c9a1b02ab2f4

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