Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3b4a7d34c216bb…

MALICIOUS

PDF

81.7 KB Created: 2021-05-17 22:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fdb739edafc58618398eff989fdad7df SHA-1: 052319a0a10925dcb3df2a62fdc9492ba5faf0ad SHA-256: bd3b4a7d34c216bb79108a6f379c11ed4a693c3430e0eb4e04fe6a30917b98bd
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it is used for phishing or to serve a second-stage payload. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=grade+9+cbse+maths+textbook+solutions PDF link annotation
    • http://ruzopiter.iblogger.org/epileptiform_eeg_patterns.pdfIn PDF document text
    • http://murerejomijuv.22web.org/atkins_physical_chemistry_11th_edition_free.pdfIn PDF document text
    • http://damodudajipofem.22web.org/inferences_worksheet_3_answer_key.pdfIn PDF document text
    • http://livopazumifena.iblogger.org/the_distance_between_us_audiobook_reyna_grande.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf415d6-8689-4ea9-b516-30276f664381/24642211073.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/80179860697.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/mecnica_vectorial_para_ingenieros_esttica_8_edicin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7869ee01-e87a-4e85-89a9-dda5a01f0a84/what_is_an_event_tag.pdfIn PDF document text
    • http://zasadawizeloz.epizy.com/wutepili.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/what_should_i_pay_for_a_2020_subaru_forester_touring.pdfIn PDF document text
    • http://dinixebun.epizy.com/ps4_ejecting_disc_tighten_screw.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/pimobovileve.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/ase_student_certification_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f924d34-1a5d-4438-8f6d-07bb78bfe0a1/fafisul.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/43183261750.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/nonokumafiwebolasuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/kavapinarabuxinanodeta.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/bidemujar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f2023d-6d97-447c-a8da-6ffa8d920654/baxopizekoro.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/cheriyal_weather_report.pdfIn PDF document text
    • http://gisipusizen.rf.gd/74174019088.pdfIn PDF document text
    • http://vebodowumiba.epizy.com/purple_bed_sheets_double.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc42d9e-4cd5-4cc6-968e-1b1032eddc8d/fotawud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78edf45f-dc0a-4b8f-b852-4d7ba8b86c8d/william_shakespeare_hamlet_act_1_scene_5.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_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 5640 bytes
SHA-256: 110155c03a565f9b0da0e95cb621bbd608c7ce48e4a353b250d9ff91a34d37ee
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 10948 bytes
SHA-256: a143a6e2323b162e0500b4e7a6000b076662ee2151bdac242f4db61741bc8757

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