Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1bf0aa782ec790f…

MALICIOUS

PDF

77.5 KB Created: 2021-02-15 13:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4752725a154280528048575d3808873f SHA-1: dfde7c62640625735bab381cc95bb6272c4f755f SHA-256: f1bf0aa782ec790f4bb4ca993cc89c12b771b8b1e2cc158a8dbb9ef5f2642b0c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/wb?keyword=como%20ser%20un%20lider%20transaccional In PDF document text
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/10bcf7c457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5fd28bb451487.pdfIn PDF document text
    • https://guxemufisi.weebly.com/uploads/1/3/2/7/132710659/15822.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/bde6a1715c72.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/sezodiboxi.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/gijeHz2/retej.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/accident_report_meaning_in_englishn0tuj.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/vogakad.pdfIn PDF document text
    • http://starkrobotics.org/lekawurezawojo3r9l4.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/fhfji5z/vuvumibebesibezafiwut.pdfIn PDF document text
    • http://reactivascotia2020.com/97294992499sqfnx.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/gfkJjie/vojumivojufepevi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/fcghQhh/zazivaradarotidom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwezamo.epizy.com/astronomy_software_android.pdfIn PDF document text
    • http://valamujunitun.epizy.com/android_manager_app.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_off0000f105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 4992 bytes
SHA-256: a0af36a28fee40fefd2d040927314d392b7a633ffa5ee25ff54186395ed0a3a6
font_01_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 11648 bytes
SHA-256: 9d357744ef9264fa0f34481ef8e00c6ce2b6ee9f4be33be0aea5206e6c08b985

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