Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59bd7caaa07b5f2…

MALICIOUS

PDF

75.1 KB Created: 2021-03-31 11:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 260904cf72708fb205bdaceffb225bf8 SHA-1: bc642aa1f4e32627d42bb719aee4004780bc526c SHA-256: f59bd7caaa07b5f20eb004b2aeab032257fdbd6824e4f29bb39293b13ecccecb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://crophysi.ru/award?keyword=types+of+bible+study+methods+pdf`. This indicates the document's primary purpose is to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=types+of+bible+study+methods+pdf In PDF document text
    • http://hamsterbig.com/sotomas113jp.pdfIn PDF document text
    • http://realwockyc.info/tepugu6vccw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_5fe7d6340e2d6.pdfIn PDF document text
    • http://copyrighthelpptteam.com/70583300732oig6n.pdfIn PDF document text
    • http://hook-up.fun/how_to_connect_k800_keyboardowpw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484383/normal_60521ef241827.pdfIn PDF document text
    • http://goledipe.22web.org/why_wont_my_hp_officejet_pro_8620_print.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_600e5c5507fb6.pdfIn PDF document text
    • http://5-euro.info/80369964314yhkje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rezugoruza.epizy.com/41533558826.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/pufaboxis.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/safari_animals_cartoon_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/deception_bay_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/zutanenet.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/4d56_engine_timing.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/92709546903.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/all_of_me_piano_sheet_music_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/barclays_business_account_closure_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/xiwiwusaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/les_cercles_de_la_forme_republique_horaires.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/ccleaner_professional_plus_crack_2018_free.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_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 5164 bytes
SHA-256: b207de8af0e913d81cb01c6c4f66c8aaf3f455b1ef98e8c2a0507848e1bc885c
font_01_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 10944 bytes
SHA-256: e4ad7b3ae08287d8a825ae287d5424afc339cc138b58221d3685f6042c4fb1e3

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