Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d178aa6d7e238b5…

MALICIOUS

PDF

67.8 KB Created: 2021-03-03 15:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 56e856167467ae873bd183a8e1e10c18 SHA-1: 7ffe393a331d9abedd0c1056f4fe544bc9050576 SHA-256: 9d178aa6d7e238b5763885d5e42f41184e66066fc107f774fc72151e191d5296
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/award?keyword=the+multiplication+table+of+36 PDF link annotation
    • http://snt-br.ru/topebaxapukato2fs4d.pdfIn PDF document text
    • http://lofarado.iblogger.org/how_many_diary_of_a_wimpy_kid_books_are_in_the_series.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/solowit-dexat.pdfIn PDF document text
    • http://cparta.moscow/beaker_full_version_apk39q9k.pdfIn PDF document text
    • http://rukozhop-guide.com/lozeb1oglb.pdfIn PDF document text
    • http://mpvideo.org/mubareligovejubodjkw3e.pdfIn PDF document text
    • http://selizixid.iblogger.org/podapitafitoduwexukur.pdfIn PDF document text
    • http://mekapetakosa.22web.org/xewixugejez.pdfIn PDF document text
    • http://soldonlittleton.com/quadratic_equation_to_vertex_form_converter1j3g1.pdfIn PDF document text
    • https://zedunuburow.weebly.com/uploads/1/3/4/0/134042823/tubajasavab-pumetude-rebamim.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/6105302.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobagiludo.rf.gd/fodagisigifadaxowoku.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/appendectomy_plural_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/jesus_mi_fiel_amigo_tablatura.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/duplicate_checker_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/asphalt_7_game_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/rezoxawatobipiratewivopa.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/checkra1n_compatibility_sheet.pdfIn PDF document text
    • http://likijanima.epizy.com/76951792254.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_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 5388 bytes
SHA-256: e1990a7b39ad36417b21d7ccd1dbfe8e80276df2d2ca3d9ea01eeb7f555e8ecd
font_01_sfnt_off0000e227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE227 9464 bytes
SHA-256: 115f1649ae985412f02d340c7f3832dddb8aadc1800a75cb1e22e898f98d34d7