Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6e2e2b56fa8fd8…

MALICIOUS

PDF

110.2 KB Created: 2021-03-24 18:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ab611ff4e0749c6338f0342ce9b42207 SHA-1: 01507d044fb736a97c7f2a426045fe683bd4deca SHA-256: 1e6e2e2b56fa8fd8b690ec2c457690b2236d8cc94c66c1d50ef12f550233d189
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to PDF generation, but no clear textual lure is discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=bronchiolitis+guidelines+aap+2017 PDF link annotation
    • http://padigixatobezu.22web.org/boca_vs_river_copa_libertadores_2004_formaciones.pdfIn PDF document text
    • http://igafnd.org/narazunixurotinezinagiluu7io5.pdfIn PDF document text
    • http://milansit.space/turbo_racing_3d_hack_game_download_unlimited_moneyp85cg.pdfIn PDF document text
    • http://zawugexoj.22web.org/calligraphy_keyboard_apk.pdfIn PDF document text
    • http://nejopovufup.iblogger.org/el_paraiso_perdido_poema.pdfIn PDF document text
    • http://wellwork.site/azhage_azhage_album_song_ringtoneddxgg.pdfIn PDF document text
    • http://nikaold.site/engineering_journal_article_templateqcj5j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a082c4c9-1bc9-4a6c-b66e-6502999db7b4/97944811358.pdfIn PDF document text
    • http://jumezezufa.rf.gd/bcmon_apk_file_for_android.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/zepalokizizur.pdfIn PDF document text
    • http://poxizaxo.epizy.com/black_and_decker_string_trimmer_gh1000_parts.pdfIn PDF document text
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_0b5be414d46048e789c6b61a4c9ba725.pdf?index=trueIn PDF document text
    • http://tagifevada.rf.gd/artritis_reumatoidea_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92462f9-0426-4bb3-85c7-d93217df8c4a/el_general_naranjo_serie.pdfIn PDF document text
    • http://zonokuje.epizy.com/fexajasimolanija.pdfIn PDF document text
    • http://godolefimew.epizy.com/robewewavomolosod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37979a78-7709-47b1-93f8-806e1f3b0337/page_break_google_docs_mobile.pdfIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_43468938049a4393b0647b95eab850b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d6b3fd-f939-4a84-9f8d-8ea67ce523e0/how_to_not_forgive_so_easily.pdfIn PDF document text
    • http://jiforexawa.rf.gd/dofe_assessors_report_gold.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_off000171e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171E1 5788 bytes
SHA-256: 927869b55d8aa6d7f1f290a16838222919e3a29e6ffc944825c79a6b4474de49
font_01_sfnt_off0001859c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1859C 11404 bytes
SHA-256: a224cdb549830b900a299f19f0722d5478dcaa3f534852147a6a3b47824d67f7

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