Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bb584a0ef222ed…

MALICIOUS

PDF

75.8 KB Created: 2021-03-12 16:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 34d21e1426f3a8a4eef4bdc95a65e69b SHA-1: a834227ebb7a0be55309c58b225f2165e88491bf SHA-256: a8bb584a0ef222ed95013a9b11fbe0867ae168f07757f4d43004faf02965105f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to mimic a search result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=autocad+plot+pdf+black+and+white PDF link annotation
    • http://prizinsta24.site/rirubuwikulujidgs8u2.pdfIn PDF document text
    • http://formblckr1.xyz/78222740508wjqxb.pdfIn PDF document text
    • http://profyhouse.ru/what_are_the_best_questions_to_ask_an_employer_during_an_interviewa1i3w.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/what_is_critical_illness_insurance_with_aflac.pdfIn PDF document text
    • http://reduslimitalia-official.website/python_enum_string_to_intk31ea.pdfIn PDF document text
    • http://cartest.pro/45847429534egt1k.pdfIn PDF document text
    • http://world-wild-shop.com/la_catedral_del_mar_serie_netflix7bnrr.pdfIn PDF document text
    • http://bimosoxadiz.22web.org/new_tamil_movies_2019_free_tamilrockers.pdfIn PDF document text
    • http://winoraama.fun/54418399543jgzs1.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/36613097132.pdfIn PDF document text
    • http://milanomoda-italy.site/ged_practice_test_math_freenxxh9.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/windows_administrator_l2_interview_questions_and_answers.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/differences_between_application_software_and_system_software.pdfIn PDF document text
    • http://discovljzg.fun/minecraft_kinetic_wind_generator916cf.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/xedewofuretujo/economic_liberalization_in_nepal.pdfIn PDF document text
    • http://tevimumuto.epizy.com/american_megatrends_cmos_settings_wrong_cmos_date_time_not_set.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/vomuze.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/xasib.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/43817746707.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/attorney_client_privilege_former_employee_california.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/bhai_the_gangster_game_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/buffalo_airstation_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/rodatofuselazafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 3936 bytes
SHA-256: d3a16f6e117b2104972e41d94ef73e8fd236dd190ccfc2eb27eb43a52b1bb6dc
font_01_sfnt_off0000ebc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC5 5256 bytes
SHA-256: 58fd14cdfb4be377c9a0bc1e0f49841de0dc009723f774d5411c132c9075cce5
font_02_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 10440 bytes
SHA-256: 35e32b56eebc17cba8045e0c642e55ce9092a947b91cba376d17f49b5053caf4

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