Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3f9b40090c4b55…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 09:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fce147052369308a3be3a6e4942ffe74 SHA-1: 2feca5d16a9fc86152de8d5ba3815fadd3547ffe SHA-256: 1b3f9b40090c4b556be4a423b6f003ef6eca209bf9369adf48f0e700ccd04eee
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or scam campaign. The PDF structure and embedded links indicate an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

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://nipisod.ru/award?keyword=samsung+rf263beaesr+ice+maker+removal PDF link annotation
    • http://shoop-ft.ru/matojefemojepavifixob5km9o.pdfIn PDF document text
    • http://kleomaften.online/jabadexovewajulolebon48te3.pdfIn PDF document text
    • http://vuxamajapaga.22web.org/rolugikemerexovegina.pdfIn PDF document text
    • http://carluxepaint.site/43092917537h08t4.pdfIn PDF document text
    • http://tafotisapuza.22web.org/ill_make_it_up_to_you_next_time_meaning.pdfIn PDF document text
    • http://milanbeachs.space/focusrite_scarlett_2i2_drivers_redditi72do.pdfIn PDF document text
    • http://uggi-ugg.com/nagagupok0xoo9.pdfIn PDF document text
    • http://sell-toclick.online/xedirajodejedusd4jj.pdfIn PDF document text
    • http://moreprodukti.com/real_motos_brasil_dinheiro_infinito_downloadbka25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonabafat/balancing_redox_reactions_practice_with_answers.pdfIn PDF document text
    • http://texulowiduje.rf.gd/duvidejesi.pdfIn PDF document text
    • http://bujitajaxo.epizy.com/39213470527.pdfIn PDF document text
    • http://bajitak.epizy.com/afunika_piki_piki_skirt_song.pdfIn PDF document text
    • http://bogasupi.rf.gd/how_to_get_google_earth_in_real_time.pdfIn PDF document text
    • http://naxosavor.rf.gd/69451174331.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/what_is_the_attitude_of_the_landlady_in_the_poem_telephone_conversation.pdfIn PDF document text
    • http://xanomake.epizy.com/is_etrade_better_than_td_ameritrade.pdfIn PDF document text
    • http://xokopaxitake.rf.gd/87836391611.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_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 6020 bytes
SHA-256: ed546297d60969b7ac33d2dab6f503a50da6cef6699b3887be5f6f45d5491957
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 10080 bytes
SHA-256: 06d9d9ba7c37ef20010144374f61439b9d51e6d18d6e100f4928ea6d7c64429e

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