Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d5a9c6ff5d8d6e…

MALICIOUS

PDF

72.7 KB Created: 2021-02-23 01:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0d0a7bba269c41ff5ee94f64f6d2e4d6 SHA-1: 777406692e81b3a14202e40d680640476c3e18ff SHA-256: f4d5a9c6ff5d8d6e0ed55b03e62542c2c880584bc167b9b2971abc8201b12a8a
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/xoguw_davexogelobe_menabaser.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=manipulating+equations+worksheet+pdf In PDF document text
    • http://6gusevshop.website/558174890108jcyn.pdfIn PDF document text
    • http://moreprodukti.com/6389086473700isq.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/xoguw_davexogelobe_menabaser.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/9875761.pdfIn PDF document text
    • http://hook-up.fun/ampicilina_comprimido_bula5c3v6.pdfIn PDF document text
    • http://cryogen.me/29139175793bc5rm.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/le_liberalisme_est_un_pechefgtz5.pdfIn PDF document text
    • http://teagreen.space/the_crossing_definitionl6ws7.pdfIn PDF document text
    • http://ulekschool.online/biviwobotiwaxuzokafosotsb5k.pdfIn PDF document text
    • http://apparently-home.com/how_to_factory_reset_garmin_nuviwwgsx.pdfIn PDF document text
    • http://usacarins.com/solimisiruwifufexaretokarvvk7.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/1ff8ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewixezix.epizy.com/legal_and_ethical_issues_in_nursing_informatics.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/legends_of_the_fall_full_movie_streaming.pdfIn PDF document text
    • http://sinumulebojufa.epizy.com/angular_material_form_value.pdfIn PDF document text
    • http://nijorirofebonin.epizy.com/xubibelafowo.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/adobe_creative_cloud_desktop_app_pc.pdfIn PDF document text
    • http://ratazudawi.epizy.com/383397035.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/vifobokumumugom.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_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 5592 bytes
SHA-256: 38c13c439886c13cae7ac57f84238a52dff7a8796165ebce4e29371da19cf8c7
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 11140 bytes
SHA-256: bbf2383ab33677b126533629ed2559a9572d06990e943a5bb629e50942561a50