Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09bc024428a6a67…

MALICIOUS

PDF

78.4 KB Created: 2021-03-03 20:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3b13a961956b150ff26571822e286f07 SHA-1: 6c1dd1536b2c3179b57d6b2488514e714818eea4 SHA-256: e09bc024428a6a672f18da6ff9fffdd3e1bbccd4e5bc36182181691bb85de943
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high likelihood of malicious intent. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to phishing or malware download sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful content.

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://botokaw.ru/123?utm_term=quantum+field+theory+and+the+standard+model+m.schwartz PDF link annotation
    • https://cdn.sqhk.co/xifinelire/Hqbgfih/shadow_blade_zero_game_free_download.pdfIn PDF document text
    • http://dixurujisefumet.22web.org/job_interview_conflict_resolution_questions_and_answers.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/wood_workbench_plans_free.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/7939905.pdfIn PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/c1620.pdfIn PDF document text
    • http://laxelenokuro.22web.org/22271881301.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/gakap.pdfIn PDF document text
    • http://gifinekinurubuk.iblogger.org/ge_eterna_series_dryer_belt.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/cib4yif/rolling_stones_logo_png.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perotufusutukes.epizy.com/80505740001.pdfIn PDF document text
    • http://bunopudo.rf.gd/59432419780.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/99326486832.pdfIn PDF document text
    • http://dobejul.epizy.com/14329415945.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/gelazi.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/balidan_film_song_free.pdfIn PDF document text
    • http://labotiz.rf.gd/how_to_eat_paleo_and_not_lose_weight.pdfIn PDF document text
    • http://baxolorojujore.rf.gd/86304123033.pdfIn PDF document text
    • http://fuxitajudosev.rf.gd/84179645474.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_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 5596 bytes
SHA-256: 8776e0abb366db890bb5effcff833f8535ecc6b6de71dfdc483102da9b7cd682
font_01_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 10828 bytes
SHA-256: bbfb0a5108364e26e2635ce4643d8963f20313f64f3086e805e3dfcee73827c7

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