Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ba4b94eb85b446…

MALICIOUS

PDF

67.3 KB Created: 2021-02-23 22:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8b0c371f4eec005a320a95590fc85ee SHA-1: c5e1c95b8ad7f3646cc26f45c437c329f4bd9a8d SHA-256: a2ba4b94eb85b446e9b6a48bddf418f9e7c2c4038ce8af3fa3f8ec7e118f82ff
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jacksth.ru/wix?keyword=google+hotmail+com+iniciar+sesion PDF link annotation
    • http://wide-do.top/why_is_the_pen_mightier_than_a_sword5txzp.pdfIn PDF document text
    • https://zivexipoter.weebly.com/uploads/1/3/1/4/131483036/7096178.pdfIn PDF document text
    • http://itanah.space/91203427876fi4og.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fcf22cf74c00.pdfIn PDF document text
    • http://mysteps.online/my_cloud_home_login_wdokhem.pdfIn PDF document text
    • https://fogebutozedelig.weebly.com/uploads/1/3/0/7/130776223/joveralozekepa-makokoxi.pdfIn PDF document text
    • https://rodefakuwutepez.weebly.com/uploads/1/3/4/3/134341390/b1a0697.pdfIn PDF document text
    • http://apelsins.space/652028213094tiq0.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/xudanuru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5fc8f9842c833.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/rawuz.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/4164451.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/zoromexemuzid/bhagavad_gita_chapter_2_verse_47_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/aggiornamento_android_asus_zenfone_4.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/singham_full_movie_parmish_verma.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/play_store_app_old_barjan.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/italian_accordion_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/search_inside_yourself_epub_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_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 5244 bytes
SHA-256: 6f51339732d6bb2408da8ccfb2cc3a310f1a069915bd25d08a16afb1e5dd3418
font_01_sfnt_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 9972 bytes
SHA-256: d8c460c849945f3e98fc68af19880ba724eb21e82f55e2e367a40643f7541fb5