Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c1d47e249eb22f…

MALICIOUS

PDF

73.6 KB Created: 2021-03-05 03:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d3e879a2472a666a3ed2737d2af845a9 SHA-1: 692161c068ad820739234d372ecc8cf3358d7f48 SHA-256: 34c1d47e249eb22f3018466eb679dde3adb5cf0dabbf678622dde5ad56f68de2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/award?keyword=legal+status+fighting+words PDF link annotation
    • http://wudaxozibutix.sportsontheweb.net/define_lusus_naturae_in_literature.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/hgn2fk7/bexefap.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/how_to_cut_triangles_for_a_quilt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fdec5bd4001d.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/pozapenalumezorunuze.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/girjhm3/games_like_good_knight_story.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/jjkjhib/implosion_never_lose_hope_full_version_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/eieihha/traffic_report_near_me_i10.pdfIn PDF document text
    • http://jubivigupowo.iblogger.org/disevuzasud.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Viagf8x/sky_pilot_3d_strike_fighters_apk.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/all_ly_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fe36b4345642.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/83677046224.pdfIn PDF document text
    • http://paxabak.mypressonline.com/3321154993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanoxamovafosox.epizy.com/ufficio_anagrafe_campoformido.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/gurmeet_bhadana_video_song.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/kenmore_elite_36-inch_over-the-range_microwave_oven.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/wubepodukud.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/52741241157.pdfIn PDF document text
    • http://zifezerolivuba.epizy.com/vaboxuxexesaminas.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/how_do_you_critically_analyse_a_journal_article.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/vizozubukenonegudeposaxo.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/apache_kafka_vs_rabbitmq_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/wotuwunalofimefal.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_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 5200 bytes
SHA-256: 7da0e93b404c730412dbccd5ebf7d93336cec40e49bcfea83c02155570118fcc
font_01_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 9780 bytes
SHA-256: 10c9e5e85c05d4608eeffcd0bfae8b4740800af6ac0e2402717f705497ed9566

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