Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4a67b2102880bc…

MALICIOUS

PDF

71.2 KB Created: 2021-02-26 18:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7819e0ccb87dd6bbcad2aa5d1b6394e4 SHA-1: d4b6bac2ac0b26f5ebd4d33d5a1442652ef8a2cf SHA-256: 5b4a67b2102880bcf5fea18692aaceca9f0629878bb42332de834a47fc124824
136 Risk Score

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
  • 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://midufefew.ru/award?keyword=ap+statistics+chapter+3b+test PDF link annotation
    • https://cdn.sqhk.co/tazifawixax/bLmsVeO/stream_live_tv_on_roku.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/agdjbHr/xorobedinelu.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/what_is_the_scout_motto.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/ct2krq1/3_doors_down_away_from_the_sun_tracklist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fcf224f23d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_60261ee9dc38d.pdfIn PDF document text
    • http://localdesign.me/the_stand_up_sketch_show_season_26lhrk.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/85819182020.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/what_is_the_return_type_of_constructor_in_java_mcq.pdfIn PDF document text
    • http://azorocheat1.xyz/classical_piano_pieces_sheet_musicm3vfq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_6015ff032dc0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fcfa647459a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remavuj/dynamics_of_machinery.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/44535321782.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/puralezawezexaf.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/bituwasojovemaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/21453083664.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_off0000ce8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8E 4856 bytes
SHA-256: 5f980819dd79f5f1d73e8c1b6b2cbcbd1299b96efa24b7e788277b91c5b4c850
font_01_sfnt_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 9976 bytes
SHA-256: a84c53c17948a32a7237fb3755d410c2769c73fab254972e1d4c51766ddb2025
font_02_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378